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• How to use more than 3 virtual disks in Linux using CentOS and XenServer

  - by 010110110101

  I've attached 5 virtual disks to a Virtual Machine in Citrix XenServer. The VM has the xs-tools installed. Initially it said that it couldn't add so many disks. After I installed the xs-tools, it let me add all the disks. But /dev doesn't show all the disks. It shows these: /dev/xvda /dev/xvdb /dev/xvdc /dev/cdrom Perhaps it is bound by the limits of an IDE bus? (3 disks + CD-ROM) If so, how does one change the VM to use SCSI? Edit: According to the documentation: 2.6.3. VM Block Devices In the PV Linux case, block devices are passed through as PV devices. XenServer does not attempt to emulate SCSI or IDE, but instead provides a more suitable interface in the virtual environment in the form of xvd* devices. It is also possible to get an sd* device using the same mechanism, where the PV driver inside the VM takes over the SCSI device namespace. This is not desirable so it is best to use xvd* where possible for PV guests (this is the default for Debian and RHEL). For Windows or other fully virtualized guests, XenServer emulates an IDE bus in the form of an hd* device. When using Windows, installing the Citrix Tools for Virtual Machines installs a special PV driver that works in a similar way to Linux, except in the fully virtualized environment. Still, with 5 virtual disks attached, I don't see the other xvd devices. Edit #2: (attached requested info) Host Machine: XenServer 6.1 Linux version 2.6.32.43-0.4.1.xs1.6.10.777.170770xen (geeko@buildhost) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-51)) #1 SMP Wed Apr 17 05:52:03 EDT 2013 Guest Machine: CentOS release 6.4 (Final) Linux version 2.6.32-358.6.2.el6.x86_64 ([email protected]) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Thu May 16 20:59:36 UTC 2013 Output of 'fdisk -l' on Guest Machine: Note, the disk beyond the first 3 attached are not displaying -- there should be 4 100GB disks. (There are a total of 5 disks displayed in XenCenter -- 16GB, 100GB, 100GB, 100GB, 100GB) Disk /dev/xvdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xfb6c95b9 Device Boot Start End Blocks Id System /dev/xvdb1 1 13054 104856223+ 83 Linux Disk /dev/xvda: 17.2 GB, 17179869184 bytes 255 heads, 63 sectors/track, 2088 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e5f41 Device Boot Start End Blocks Id System /dev/xvda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/xvda2 64 2089 16264192 8e Linux LVM Disk /dev/xvdc: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xed249ced Device Boot Start End Blocks Id System /dev/xvdc1 1 13054 104856223+ 83 Linux Disk /dev/mapper/vg_blue-lv_root: 14.6 GB, 14571012096 bytes 255 heads, 63 sectors/track, 1771 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_blue-lv_swap: 2080 MB, 2080374784 bytes 255 heads, 63 sectors/track, 252 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 I see that the Linux versions say SMP. The Guest VM doesn't say "xen" in the name. However, I have already run yum install kernel-xen. Could be a clue?

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• Issues Converting Plain Text Into Microsoft Word Bulleted Lists

  - by user787832

  I'm a programmer. I hate status reports. I found a way to live with it. While I am working in my IDE ( Visual Slickedit ) I keep a plain text file open in one of the file/buffer tabs. As I finish things I just jot down a quick note into that file. At the end of the week that becomes my weekly status report. Example entries: The Datatables.net plugin runs very slowly in IE 8 with more than 2,000 records. I changed the way I did the server side code to process the data to make less work for the plugin to get decent performance for the IE 8 users. I made a class to wrap data from the new data collection objects into the legacy data holder objects. This will let the new database code be backward compatible with the legacy code until we can replace it. I found the bug reported by Jane. The software is fine. The database we use for the test site has data that is corrupted in a way it wouldn't be for production site At the end of the month I go back to each weekly *.txt file and paste all of the entries into a MS Word file for a monthly report. I give the monthly report to a liason to the contracting company who has to compile everyone's monthly reports into a single MS Word 2007 document. His problem, soon to be my problem, comes when he highlights my paragraphs like the ones above to put bullets in front of my paragraphs. When he highlights my notes to put bullets in front of them with MS Word 2007, Word rearranges the text a bit and the new line chars/carriage returns stagger the text so the text is no longer in neat chunks. This: I found the bug reported by Jane. The software is fine. The database we use for the test site has data that is corrupted in a way it wouldn't be for production site Becomes This: I found the bug reported by Jane. The software is fine. The database we use for the test site has data that is corrupted in a way it wouldn't be for production site I tried turning word wrap on in my IDE for the text files I put my status notes in. It just puts some kind of newline character in anyway. Searching/Replacing those chars in the text files has the result of destroying the paragraphs. Once my notes are pasted into MS Word, Word automatically translates them into paragraph breaks. Searching/Replacing them there has similar results. Blank lines separating the notes disappears. One big mess. What I would like is to be able to keep adding my status notes to a text file as I am now, but do something different when I paste the notes into MS Word such that my liason can select the text, hit the bulleting command and NOT have the staggered text as shown above. Any ideas? Thanks much in advance Steve

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• VPS 512 MB RAM with WordPressMU comes to consumes lots of memory

  - by CAPitalZ

  I have googled for days and gathered all optimization suggestions and tried. My sites are not getting any high hits. May be like 100 hits per day [all my sites combined]. Here are my specs I have 512 MB RAM VPS with burstable 1024 MB. Centos 5 32-bit & cPanel/WHM Apache 2.2 MySQL 5.0 PHP 5.3.2 Here is my Configs I have 2 WordPressMU production sites, and 1 test site my.cnf # The following options will be passed to all MySQL clients [client] #password = your_password port = 3306 socket = /var/lib/mysql/mysql.sock # Here follows entries for some specific programs # The MySQL server [mysqld] port = 3306 socket = /var/lib/mysql/mysql.sock skip-locking skip-bdb skip-innodb key_buffer = 16M max_allowed_packet = 1M table_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M #CAPitalZ thread_cache_size=8 thread_concurrency=4 #query_cache_type=1 #query_cache_limit=1M query_cache_size=16M concurrent_insert=2 low_priority_updates=1 max_connections=50 tmp_table_size=16M max_heap_table_size=16M join_buffer_size=1M interactive_timeout=25 wait_timeout=1000 #connect_timout=10 not able to restart mysql max_connect_errors=10 # Don't listen on a TCP/IP port at all. This can be a security enhancement, # if all processes that need to connect to mysqld run on the same host. # All interaction with mysqld must be made via Unix sockets or named pipes. # Note that using this option without enabling named pipes on Windows # (via the "enable-named-pipe" option) will render mysqld useless! # skip-networking # Disable Federated by default skip-federated # Replication Master Server (default) # binary logging is required for replication log-bin=mysql-bin # required unique id between 1 and 2^32 - 1 # defaults to 1 if master-host is not set # but will not function as a master if omitted server-id = 1 [mysqld_safe] open_files_limit=8192 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates [isamchk] key_buffer = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [myisamchk] key_buffer = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout httpd.conf I have unselected many modules and recompiled using EasyApache in WHM. Only have the following modules built Deflate Expires Fileprotect Imagemap MPM Prefork Version [default] EAccelerator for PHP Bcmath Calendar CurlSSL [I'm using Curl. But I don't have any https sites] Expat GD [for image cropping] Gettext Imap Mbregex [default] Mbstring [need both Mbregex and Mbstring for utf-8] Mysql of the system MySQL "Improved" extension. Sockets TTF (FreeType) [I'm using custom font] Zlib Under Global Configuration I only have FollowSymLinks enabled I Have TraceEnable, ServerSignature, FileETag OFF ServerTokens ProductOnly DirectoryIndex Priority has index.php as the first one I have removed Clamd [Clam Anti-virus] SpamAssasin is Off Under Tweak Settings Default catch-all/default address behavior for new accounts. This is set to "fail" All stats programs turned off I have eAccelerator installed and checked in phpinfo and its working [Pre VirtualHost Include under WHM] Timeout 20 KeepAlive On MaxKeepAliveRequests 200 KeepAliveTimeout 3 MinSpareServers 1 MaxSpareServers 3 StartServers 1 ServerLimit 50 MaxClients 50 MaxRequestsPerChild 4000 ExtendedStatus Off #ServerType standalone this throws error HostnameLookups Off <Directory "/"> AllowOverride None </Directory> My sites will take ages to load and WHM/CPanel will not even load. adadaa.com/ http://adadaa.net/ kadais.ca/ My average memory consumption is like 1000 MB! [yes always bursting] The process that consumes most CPU and also most memory is mysql But I also get like 15 httpd processes [when its bursting] I already got warning from cpuwatchcheck saying "While processing, the cpu has been maxed out for more than a 6 hour period. The current load/uptime line on the server at the time of this email is 07:00:37 up 11:30, 0 users, load average: 14.64, 16.79, 20.07" I don't know, I have tried switching these config values many different times, but nothing seems to work. Please show some light... Thanks

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• nconf nagios config no services defined

  - by user1508056

  I've setup Nagios core on OSX 10.7 server via macports fine. It seems to load fine and the sample config files all copied over to /opt/local/etc/nagios/objects/ fine and are specified correctly in the nagios.cfg file. I then installed nconf manually and got it running without much fight. Then I clicked on "Generate Nagios config" in nconf and get 1 warning and 4 errors. When I expand the error box here what I see: Nagios Core 3.5.0 Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors Copyright (c) 1999-2009 Ethan Galstad Last Modified: 03-15-2013 License: GPL Website: http://www.nagios.org Reading configuration data... Read main config file okay... Read object config files okay... Running pre-flight check on configuration data... Checking services... Error: There are no services defined! Checked 0 services. Checking hosts... Error: There are no hosts defined! Checked 0 hosts. Checking host groups... Checked 0 host groups. Checking service groups... Checked 0 service groups. Checking contacts... Error: There are no contacts defined! Checked 0 contacts. Checking contact groups... Checked 0 contact groups. Checking service escalations... Checked 0 service escalations. Checking service dependencies... Checked 0 service dependencies. Checking host escalations... Checked 0 host escalations. Checking host dependencies... Checked 0 host dependencies. Checking commands... Checked 0 commands. Checking time periods... Checked 0 time periods. Checking for circular paths between hosts... Checking for circular host and service dependencies... Checking global event handlers... Checking obsessive compulsive processor commands... Checking misc settings... Warning: Nothing specified for illegal_macro_output_chars variable! Total Warnings: 1 Total Errors: 3 I've tried several different things (played with cache settings, changed file permissions/ownership, edited some config files manually, etc.) but nothing gets me past this step. The thing is, when I run 'sudo nagios -v /opt/local/etc/nagios/nagios.cfg' the output shows it is reading a number of services, a localhost, and a contact in the .cfg files...so I'm pretty confident those are ok and the problem is nconf isnt reading the correct .cfg files or something like that. Any ideas what to double check? I did lots of googling and found nothing on this specific issue--so either I'm special (I'm not) or am overlooking something really simple. The path to nagios binary is listed as /opt/local/bin/nagios, if that matters. Also, all the nagios files are owned by nagios:nagios, wheras nconf files are owned by user, with only the directories/files specified in the nconf docs belonging to the _www user and/or group (things like output, temp, config, etc.). Thanks.

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• mySQL Optimization Suggestions

  - by Brian Schroeter

  I'm trying to optimize our mySQL configuration for our large Magento website. The reason I believe that mySQL needs to be configured further is because New Relic has shown that our SELECT queries are taking a long time (20,000+ ms) in some categories. I ran MySQLTuner 1.3.0 and got the following results... (Disclaimer: I restarted mySQL earlier after tweaking some settings, and so the results here may not be 100% accurate): >> MySQLTuner 1.3.0 - Major Hayden <[email protected]> >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering [OK] Currently running supported MySQL version 5.5.37-35.0 [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MRG_MYISAM [--] Data in MyISAM tables: 7G (Tables: 332) [--] Data in InnoDB tables: 213G (Tables: 8714) [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17) [--] Data in MEMORY tables: 0B (Tables: 353) [!!] Total fragmented tables: 5492 -------- Security Recommendations ------------------------------------------- [!!] User '@host5.server1.autopartsnetwork.com' has no password set. [!!] User '@localhost' has no password set. [!!] User 'root@%' has no password set. -------- Performance Metrics ------------------------------------------------- [--] Up for: 5h 3m 4s (5M q [317.443 qps], 42K conn, TX: 18B, RX: 2B) [--] Reads / Writes: 95% / 5% [--] Total buffers: 35.5G global + 184.5M per thread (1024 max threads) [!!] Maximum possible memory usage: 220.0G (174% of installed RAM) [OK] Slow queries: 0% (6K/5M) [OK] Highest usage of available connections: 5% (61/1024) [OK] Key buffer size / total MyISAM indexes: 512.0M/3.1G [OK] Key buffer hit rate: 100.0% (102M cached / 45K reads) [OK] Query cache efficiency: 66.9% (3M cached / 5M selects) [!!] Query cache prunes per day: 3486361 [OK] Sorts requiring temporary tables: 0% (0 temp sorts / 812K sorts) [!!] Joins performed without indexes: 1328 [OK] Temporary tables created on disk: 11% (126K on disk / 1M total) [OK] Thread cache hit rate: 99% (61 created / 42K connections) [!!] Table cache hit rate: 19% (9K open / 49K opened) [OK] Open file limit used: 2% (712/25K) [OK] Table locks acquired immediately: 100% (5M immediate / 5M locks) [!!] InnoDB buffer pool / data size: 32.0G/213.4G [OK] InnoDB log waits: 0 -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance MySQL started within last 24 hours - recommendations may be inaccurate Reduce your overall MySQL memory footprint for system stability Enable the slow query log to troubleshoot bad queries Increasing the query_cache size over 128M may reduce performance Adjust your join queries to always utilize indexes Increase table_cache gradually to avoid file descriptor limits Read this before increasing table_cache over 64: http://bit.ly/1mi7c4C Variables to adjust: *** MySQL's maximum memory usage is dangerously high *** *** Add RAM before increasing MySQL buffer variables *** query_cache_size (> 512M) [see warning above] join_buffer_size (> 128.0M, or always use indexes with joins) table_cache (> 12288) innodb_buffer_pool_size (>= 213G) My my.cnf configuration is as follows... [client] port = 3306 [mysqld_safe] nice = 0 [mysqld] tmpdir = /var/lib/mysql/tmp user = mysql port = 3306 skip-external-locking character-set-server = utf8 collation-server = utf8_general_ci event_scheduler = 0 key_buffer = 512M max_allowed_packet = 64M thread_stack = 512K thread_cache_size = 512 sort_buffer_size = 24M read_buffer_size = 8M read_rnd_buffer_size = 24M join_buffer_size = 128M # for some nightly processes client sessions set the join buffer to 8 GB auto-increment-increment = 1 auto-increment-offset = 1 myisam-recover = BACKUP max_connections = 1024 # max connect errors artificially high to support behaviors of NetScaler monitors max_connect_errors = 999999 concurrent_insert = 2 connect_timeout = 5 wait_timeout = 180 net_read_timeout = 120 net_write_timeout = 120 back_log = 128 # this table_open_cache might be too low because of MySQL bugs #16244691 and #65384) table_open_cache = 12288 tmp_table_size = 512M max_heap_table_size = 512M bulk_insert_buffer_size = 512M open-files-limit = 8192 open-files = 1024 query_cache_type = 1 # large query limit supports SOAP and REST API integrations query_cache_limit = 4M # larger than 512 MB query cache size is problematic; this is typically ~60% full query_cache_size = 512M # set to true on read slaves read_only = false slow_query_log_file = /var/log/mysql/slow.log slow_query_log = 0 long_query_time = 0.2 expire_logs_days = 10 max_binlog_size = 1024M binlog_cache_size = 32K sync_binlog = 0 # SSD RAID10 technically has a write capacity of 10000 IOPS innodb_io_capacity = 400 innodb_file_per_table innodb_table_locks = true innodb_lock_wait_timeout = 30 # These servers have 80 CPU threads; match 1:1 innodb_thread_concurrency = 48 innodb_commit_concurrency = 2 innodb_support_xa = true innodb_buffer_pool_size = 32G innodb_file_per_table innodb_flush_log_at_trx_commit = 1 innodb_log_buffer_size = 2G skip-federated [mysqldump] quick quote-names single-transaction max_allowed_packet = 64M I have a monster of a server here to power our site because our catalog is very large (300,000 simple SKUs), and I'm just wondering if I'm missing anything that I can configure further. :-) Thanks!

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• Why am I unable to telnet to a local port that has a listening service?

  - by Skip Huffman

  I suspect this is either a very simple question, or a very complex one. I have a headless server running ubuntu 10.04 that I can ssh into. I have full root access to the system. I am trying to set up an ssh tunnel to allow me to vnc to the system (but that isn't my question. I have vnc running on port 5903, here is the netstat output for that: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:5903 0.0.0.0:* LISTEN 7173/Xtightvnc tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 465/sshd But when I try to telnet to that port, from within the same system and login, I get unable to connect errors # telnet localhost 5903 Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection timed out I am able to telnet to port 22 (as a verification) ~# telnet localhost 22 Trying ::1... Connected to localhost. Escape character is '^]'. SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu7 I have tried to open up any possible ports using ufw (probably clumsy fashion) # ufw status numbered Status: active To Action From -- ------ ---- [ 1] 5903 ALLOW IN Anywhere [ 2] 22 ALLOW IN Anywhere What else might be blocking this connection locally? Thank you, Edit: The only reference to port 5903 in iptable -L -n is this: Chain ufw-user-input (1 references) target prot opt source destination ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:5903 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:5903 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:22 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:8080 I can post the whole output if that will be useful. hosts.allow and hosts.deny both contain only comments. Re-Edit: Some other questions pointed me to nmap, so I ran a portscan through that utility: # nmap -v -sT localhost -p1-65535 Starting Nmap 5.00 ( http://nmap.org ) at 2011-11-09 09:58 PST NSE: Loaded 0 scripts for scanning. Warning: Hostname localhost resolves to 2 IPs. Using 127.0.0.1. Initiating Connect Scan at 09:58 Scanning localhost (127.0.0.1) [65535 ports] Discovered open port 22/tcp on 127.0.0.1 Connect Scan Timing: About 18.56% done; ETC: 10:01 (0:02:16 remaining) Connect Scan Timing: About 44.35% done; ETC: 10:00 (0:01:17 remaining) Completed Connect Scan at 10:00, 112.36s elapsed (65535 total ports) Host localhost (127.0.0.1) is up (0.00s latency). Interesting ports on localhost (127.0.0.1): Not shown: 65533 filtered ports PORT STATE SERVICE 22/tcp open ssh 80/tcp closed http Read data files from: /usr/share/nmap Nmap done: 1 IP address (1 host up) scanned in 112.43 seconds Raw packets sent: 0 (0B) | Rcvd: 0 (0B) I think this shows that 5903 is blocked somehow. Which I pretty much knew. The question remains what is blocking it and how to modify. Re-re-edit: To check Paul Lathrop's suggested answer, I first verified my ip address with ifconfig: eth0 Link encap:Ethernet HWaddr 02:16:3e:42:28:8f inet addr:10.0.10.3 Bcast:10.0.10.255 Mask:255.255.255.0 Then tried to telnet to 5903 from that address: # telnet 10.0.10.3 5903 Trying 10.0.10.3... telnet: Unable to connect to remote host: Connection timed out No luck. Re-re-re-re-edit: Ok, I think I have isolated it a bit to vncserver, not the firewall, darn it. I shut off vncserver and had netcat listen on port 5903. My vnc client then was able to establish a connnection and sit and wait for a response. Looks like I should be chasing a vnc problem. At least that is progress Thanks for the help

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• GooglePlayServicesNotAvailable: GooglePlayServices not available due to error 1

  - by Mathias Lin

  I'm on Galaxy S III with Android 4.0.4, Google Play installed. In my app I try to get a token from the Google Play services, as described on https://developers.google.com/android/google-play-services/authentication. Since it's all quite new (the Google pages were last updated this week), there's not much documentation to be found, especially about each specific error code. final String token = GoogleAuthUtil.getToken(this, "[email protected]", "scope"); gives me an exception: 09-30 11:24:36.075: ERROR/GoogleAuthUtil(11984): GooglePlayServices not available due to error 1 09-30 11:24:36.105: ERROR/AuthTokenCheck_(11984): Error 1 com.google.android.gms.auth.GooglePlayServicesAvailabilityException: GooglePlayServicesNotAvailable at com.google.android.gms.auth.GoogleAuthUtil.f(Unknown Source) at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source) at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source) at mobi.app.activity.AuthTokenCheck.getAndUseAuthTokenBlocking(AuthTokenCheck.java:148) at mobi.app.activity.AuthTokenCheck$1.doInBackground(AuthTokenCheck.java:61) at android.os.AsyncTask$2.call(AsyncTask.java:264) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) at java.util.concurrent.FutureTask.run(FutureTask.java:137) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) at java.lang.Thread.run(Thread.java:856) https://developers.google.com/android/google-play-services/reference/com/google/android/gms/auth/package-summary tells me: GooglePlayServicesAvailabilityExceptions are special instances of UserRecoverableAuthExceptions which are thrown when the expected Google Play services app is not available for some reason. But what exactly does that mean? And how to resolve it? I've added the Google Play services extras in my SDK and the jar to my project, marked as 'exported'. I'm also wondering what the "Google Play services app" exactly is. Unfortunately it's all not very clearly described at https://developers.google.com/android/google-play-services/. The Google Play services component is delivered as an APK through the Google Play Store, so updates to Google Play services are not dependent on carrier or OEM system image updates. Newer devices will also have Google Play services as part of the device's system image, but updates are still pushed to these newer devices through the Google Play Store. Isn't "Google Play services" app the same as the "Google Play" app? Another question I have, due to lack of documentation: what is the scope parameter for? The documentation just says the following, but not defining what an 'authentication scope' exactly is: scope String representing the authentication scope.

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• WPF Combobox: Autocomplete

  - by user279244

  Hi, I have implemented a Autocomplete enabled Combobox in WPF. It is like below... private void cbxSession_Loaded(object sender, RoutedEventArgs e) { cbxSession.ApplyTemplate(); TextBox textBox = cbxSession.Template.FindName("PART_EditableTextBox", cbxSession) as TextBox; textBox.IsReadOnly = false; if (textBox != null) { textBox.KeyUp += new KeyEventHandler(textBox_KeyUp); textBox.KeyUp += delegate { ///open the drop down and start filtering based on what the user types into the combobox cbxSession.IsDropDownOpen = true; cbxSession.Items.Filter += a => { if (a.ToString().ToUpper().Contains(textBox.Text.ToUpper())) return true; else return false; }; }; } } void textBox_KeyUp(object sender, KeyEventArgs e) { if ((e.Key == System.Windows.Input.Key.Up) || (e.Key == System.Windows.Input.Key.Down)) { e.Handled = true; } else if (e.Key == System.Windows.Input.Key.Enter) { e.Handled = true; cbxSession.IsDropDownOpen = false; } } void textBox_KeyDown(object sender, KeyEventArgs e) { cbxSession.SelectionChanged -= cbxSession_SelectionChanged; if (e.Key == System.Windows.Input.Key.Enter) { e.Handled = true; cbxSession.SelectionChanged += cbxSession_SelectionChanged; } if ((e.Key == System.Windows.Input.Key.Up) || (e.Key == System.Windows.Input.Key.Down)) { e.Handled = true; } } private void cbxSession_DropDownClosed(object sender, EventArgs e) { if (cbxSession.Text != "") { TextBox textBox = cbxSession.Template.FindName("PART_EditableTextBox", cbxSession) as TextBox; if (!cbxSession.Items.Contains(textBox.Text)) { textBox.Text = cbxSession.Text; } } } private void cbxSession_DropDownOpened(object sender, EventArgs e) { cbxSession.Items.Filter += a => { return true; }; } <ComboBox x:Name="cbxSession" Width="260" Canvas.Top="5" Canvas.Left="79" Height="25" Visibility="Visible" SelectionChanged="cbxSession_SelectionChanged" MaxDropDownHeight="200" IsTextSearchEnabled="False" IsEditable="True" IsReadOnly="True" Loaded="cbxSession_Loaded" DropDownClosed="cbxSession_DropDownClosed" StaysOpenOnEdit="True" DropDownOpened="cbxSession_DropDownOpened"> <ComboBox.ItemsPanel> <ItemsPanelTemplate> <VirtualizingStackPanel IsVirtualizing="True" IsItemsHost="True"/> </ItemsPanelTemplate> </ComboBox.ItemsPanel> </ComboBox> But, the problem I am facing is... When I try searching, the first character goes missing. And this happens only once. Secondly, When I am using Arrow buttons to the filtered items, the ComboboxSelectionChanged event is fired. Is there any way to make it fire only on the click of 'Enter'

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• NSFetchedResultsController crashing on performFetch: when using a cache

  - by Oliver

  I make use of NSFetchedResultsController to display a bunch of objects, which are sectioned using dates. On a fresh install, it all works perfectly and the objects are displayed in the table view. However, it seems that when the app is relaunched I get a crash. I specify a cache when initialising the NSFetchedResultsController, and when I don't it works perfectly. Here is how I create my NSFetchedResultsController: - (NSFetchedResultsController *)results { // If we are not nil, stop here if (results != nil) return results; // Create the fetch request, entity and sort descriptors NSFetchRequest *fetch = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:self.managedObjectContext]; NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"utc_start" ascending:YES]; NSArray *descriptors = [[NSArray alloc] initWithObjects:descriptor, nil]; // Set properties on the fetch [fetch setEntity:entity]; [fetch setSortDescriptors:descriptors]; // Create a fresh fetched results controller NSFetchedResultsController *fetched = [[NSFetchedResultsController alloc] initWithFetchRequest:fetch managedObjectContext:self.managedObjectContext sectionNameKeyPath:@"day" cacheName:@"Events"]; fetched.delegate = self; self.results = fetched; // Release objects and return our controller [fetched release]; [fetch release]; [descriptor release]; [descriptors release]; return results; } These are the messages I get when the app crashes: FATAL ERROR: The persistent cache of section information does not match the current configuration. You have illegally mutated the NSFetchedResultsController's fetch request, its predicate, or its sort descriptor without either disabling caching or using +deleteCacheWithName: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'FATAL ERROR: The persistent cache of section information does not match the current configuration. You have illegally mutated the NSFetchedResultsController's fetch request, its predicate, or its sort descriptor without either disabling caching or using +deleteCacheWithName:' I really have no clue as to why it's saying that, as I don't believe I'm doing anything special that would cause this. The only potential issue is the section header (day), which I construct like this when creating a new object: // Set the new format [formatter setDateFormat:@"dd MMMM"]; // Set the day of the event [event setValue:[formatter stringFromDate:[event valueForKey:@"utc_start"]] forKey:@"day"]; Like I mentioned, all of this works fine if there is no cache involved. Any help appreciated!

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• How to upload web.config file using WebDAV on IIS7?

  - by Martin Liversage

  I want to copy an ASP.NET MVC website to a remote IIS 7 server using WebDAV. I have created a site in IIS, enabled WebDAV and assigned a special application pool I have named "WebDAV Application Pool". Using a Windows 7 or Vista client I'm able to mount the remote site as a network drive. So far, so good. However, I have problems uploading web.config files to the remote site. One problem is that as soon as a web.config has been uploaded it is used to configure the WebDAV site. The web.config file in a Views folder of a MVC project effectively blocks access to that folder. To work around this problem I have configured the application pool in the applicationHost.config file: <configuration> <applicationPools> <add name="WebDAV Application Pool" autoStart="true" enableConfigurationOverride="false" /> </applicationPools> </configuration> The interesting part is the 'enableConfigurationOverride` attribute: When true, indicates that delegated settings in Web.config files will processed for applications within this application pool. When false, all settings in Web.config files will be ignored for this application pool. Doing this makes it possible to upload a web.config file to the Views folder without breaking access to the folder. However, I'm still unable to upload a web.config file to the root folder. I have the following settings in the applicationHost.config file to ensure that request filtering doesn't interfere with WebDAV: <configuration> <location path="webdav.mysite.tld"> <system.webServer> <security> <requestFiltering> <fileExtensions applyToWebDAV="false" /> <verbs applyToWebDAV="false" /> <hiddenSegments applyToWebDAV="false" /> </requestFiltering> </security> </system.webServer> </location> </configuration> In particular hiddenSegments will normally block access to web.config but setting the applyToWebDAV attribute to false should ensure that this file isn't blocked when using WebDAV. Unfortunately, I'm still unable to copy my web.config file to the root folder of the site. Doing drag and drop in Windows Explorer to the mapped WebDAV network drive will result in the following error message: Error 0x80070057: The parameter is incorrect. On the wire it seems that the HTTP status 400 Bad Request is returned. Is there anything I can do to configure WebDAV on IIS 7 to avoid this problem?

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• Linux - serial port read returning EAGAIN...

  - by Andre

  Hello all! I am having some trouble reading some data from a serial port I opened the following way. I've used this instance of code plenty of times and all worked fine, but now, for some reason that I cant figure out, I am completely unable to read anything from the serial port. I am able to write and all is correctly received on the other end, but the replies (which are correctly sent) are never received (No, the cables are all ok ;) ) The code I used to open the serial port is the following: fd = open("/dev/ttyUSB0", O_RDWR | O_NONBLOCK | O_NOCTTY); if (fd == -1) { Aviso("Unable to open port"); return (fd); } else { //Get the current options for the port... bzero(&options, sizeof(options)); /* clear struct for new port settings */ tcgetattr(fd, &options); /*-- Set baud rate -------------------------------------------------------*/ if (cfsetispeed(&options, SerialBaudInterp(BaudRate))==-1) perror("On cfsetispeed:"); if (cfsetospeed(&options, SerialBaudInterp(BaudRate))==-1) perror("On cfsetospeed:"); //Enable the receiver and set local mode... options.c_cflag |= (CLOCAL | CREAD); options.c_cflag &= ~PARENB; /* Parity disabled */ options.c_cflag &= ~CSTOPB; options.c_cflag &= ~CSIZE; /* Mask the character size bits */ options.c_cflag |= SerialDataBitsInterp(8); /* CS8 - Selects 8 data bits */ options.c_cflag &= ~CRTSCTS; // disable hardware flow control options.c_iflag &= ~(IXON | IXOFF | IXANY); // disable XON XOFF (for transmit and receive) options.c_cflag |= CRTSCTS; /* enable hardware flow control */ options.c_cc[VMIN] = 0; //min carachters to be read options.c_cc[VTIME] = 0; //Time to wait for data (tenths of seconds) //Set the new options for the port... tcflush(fd, TCIFLUSH); if (tcsetattr(fd, TCSANOW, &options)==-1) { perror("On tcsetattr:"); } PortOpen[ComPort] = fd; } return PortOpen[ComPort]; After the port is initializeed I write some stuff to it through simple write command... int nc = write(hCom, txchar, n); where hCom is the file descriptor (and it's ok), and (as I said) this works. But... when I do a read afterwards, I get a "Resource Temporarily Unavailable" error from errno. I tested select to see when the file descriptor had something t read... but it always times out! I read data like this: ret = read(hCom, rxchar, n); and I always get an EAGAIN and I have no idea why. All help would be appreciated. Cheers

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• Asp.Net MVC EnableClientValidation doesnt work.

  - by Farrell

  I want as well as Client Side Validation as Server Side Validation. I realized this as the following: Model: ( The model has a DataModel(dbml) which contains the Test class ) namespace MyProject.TestProject { [MetadataType(typeof(TestMetaData))] public partial class Test { } public class TestMetaData { [Required(ErrorMessage="Please enter a name.")] [StringLength(50)] public string Name { get; set; } } } Controller is nothing special. The View: <% Html.EnableClientValidation(); %> <% using (Ajax.BeginForm("Index", "Test", FormMethod.Post, new AjaxOptions {}, new { enctype = "multipart/form-data" })) {%> <%= Html.AntiForgeryToken()%> <fieldset> <legend>Widget Omschrijving</legend> <div> <%= Html.LabelFor(Model => Model.Name) %> <%= Html.TextBoxFor(Model => Model.Name) %> <%= Html.ValidationMessageFor(Model => Model.Name) %> </div> </fieldset> <div> <input type="submit" value="Save" /> </div> <% } %> To make this all work I added also references to js files: <script src="../../Scripts/MicrosoftAjax.js" type="text/javascript"></script> <script src="../../Scripts/MicrosoftMvcAjax.js" type="text/javascript"></script> <script src="../../Scripts/MicrosoftMvcValidation.js" type="text/javascript"></script> <script src="../../Scripts/jquery-1.4.1.min.js" type="text/javascript"></script> Eventually it has to work, but it doesnt work 100%: It does validates with no page refresh after pressing the button. It also does "half" Client Side Validation. Only when you type some text into the textbox and then backspace the typed text. The Client Side Validation appears. But when I try this by tapping between controls there's no Client Side Validation. Do I miss some reference or something? (I use Asp.Net MVC 2 RTM)

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• Cannot get UISearchBar Scope Bar to appear in Toolbar on iPad

  - by Jann

  This is really causing me fits. I put a toolbar on the IUView on the iPad. I added the following: Search Bar (not Search Bar and Search Display) to the toolbar. I set the options to be as follows: Show Cancel Button, Show Scope Bar, Scope Button Titles are: "Title1" and "Title2" (with Title2's radio button selected). Opaque, Clear Context and Auto Resize are checked. I hooked up the delegate of Search Bar to the "File's Owner" and linked it to IBOutlet theSearchBar. In my viewWillAppear I have the following: [theSearchBar setScopeButtonTitles:[NSArray arrayWithObjects:@"Near Me",@"Everywhere",nil]]; //Just in case: [theSearchBar setShowsScopeBar:YES]; //doesn't seem to do anything: //[theSearchBar sizeToFit]; searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:theSearchBar contentsController:self]; [self setSearchDisplayController:searchDisplayController]; [searchDisplayController setDelegate:self]; [searchDisplayController setSearchResultsDataSource:self]; //again--does not seem to do anything..but people have suggested it: [theSearchBar sizeToFit]; Okay, so far, I thought, so good. So, I made the File's Owner .m file to be a delegate for: UISearchBarDelegate, UISearchDisplayDelegate. My issue: I have yet to implement the delegates necessary to do the search but still... shouldn't I be seeing the scopeBar next to the search field when I click into the search field? Just so you know I DO see the log of the characters I type, so the delegate is working. I have the following dummy functions in the .m file (just in case) // called when keyboard search button pressed - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar { NSLog(@"Search Button Clicked\n"); [theSearchBar resignFirstResponder]; } // called when cancel button pressed - (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar { NSLog(@"Cancel Button Clicked\n"); [theSearchBar resignFirstResponder]; } - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { NSLog(@"Search Text So Far: '%@'\n",searchText); } - (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar { return YES; } - (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar { return YES; } Why doesn't the Scope Bar appear? A results UIPopoverController appears with the title "Results" and "No results found" (of course) when i type the first character in my search...but no scope bar. (not that i expect anything other than "No Results Found". I am wondering where the scope bar is supposed to appear...in the titleView of the UIPopover? In the toolbar to the right of the search area? Where?

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• Delphi SOAP Envelope and WCF

  - by Chris

  Hi all, I am working on a system that provides a soap interface. One of the systems that are going to use the interface is coded in Delphi 7. The web service is developed with WCF, basic http binding, SOAP 1.1. If I use SOAP UI (JAVA), the service works properly. But Delphi seems to do special things here ;) This is how the message looks like in SOAP UI: <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://services.xxx.de/xxx"> <soapenv:Header/> <soapenv:Body> <ser:GetCustomer> <!--Optional:--> <ser:GetCustomerRequest> <!-- this is a data contract --> <ser:Id>?</ser:Id> </ser:GetCustomerRequest> </ser:GetCustomer> </soapenv:Body> </soapenv:Envelope> I am not a delphi developer , but I developed a simple test client to see what's going wrong. This what Delphi sends as a SOAP envelope. <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"> <SOAP-ENV:Body SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:NS2="http://services.xxx.de/xxx"> <NS1:GetCustomer xmlns:NS1="http://services.xxx.de/xxx"> <GetCustomerRequest href="#1"/> </NS1:GetCustomer> <NS2:GetCustomerRequest id="1" xsi:type="NS2:GetCustomerRequest"> <Id xsi:type="xsd:int">253</Id> </NS2:GetCustomerRequest> </SOAP-ENV:Body> </SOAP-ENV:Envelope> WCF throws an error that is in German language... ;) Es wurde das Endelement "Body" aus Namespace "http://schemas.xmlsoap.org/soap/envelope/" erwartet. Gefunden wurde "Element "NS2:GetCustomerRequest" aus Namespace "http://services.xxx.de/xxx"". Zeile 1, Position 599. Means something like The Body was expected. But instead the Element "NS2:GetCustomerReques" was found. Now my questions is: Can I somehow change the way Delphi creates the envelope? Or are the ways to make WCF work with such message formats? Any help is greatly appreciated!

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• Custom RoleProvider with MVC 2.0 webconfig

  - by Farrell

  I have a custom MembershipProvider and a custom RoleProvider. I created the custom MembershipProvider by creating a SimpleMembershipProvider class which implements the MembershipProvider class. After that I changed my web.config and works. So I used the same approach creating a custom RoleProvider. Nothing special, just creating a SimpleRoleProvider class which implements the RoleProvider class. But then when I changed the web.config file and runs the solution I get the following error message: Web.Config <membership defaultProvider="DashboardMembershipProvider"> <providers> <clear/> <add name="SimpleMembershipProvider" type="Dashboard.Web.Controlling.Account.SimpleMembershipProvider" /> </providers> </membership> <roleManager enabled="true" defaultProvider="DashboardRoleProvider"> <providers> <clear/> <add name="DashboardRoleProvider" type="Dashboard.Web.Controlling.Account.DashboardRoleProvider" /> </providers> </roleManager> Configuration Error Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: No parameterless constructor defined for this object. Source Error Line 78: <add name="SimpleRoleProvider" Line 79: type="Dashboard.Web.Controlling.Account.SimpleRoleProvider" /> So I searched the web. And tried on the type attribute, which generates the following errors: Configuration Error Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: Could not load file or assembly 'Dashboard.Web.Controlling.Account' or one of its dependencies. The system cannot find the file specified. Source Error: Line 78: <add name="SimpleRoleProvider" Line 79: type="Dashboard.Web.Controlling.Account.SimpleRoleProvider,Dashboard.Web.Controlling.Account" /> Any suggestions on how I would be able to get this CustomRoleProvider working? Any help is greatly appreciated!

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• JSF a4j:commandButton not working when 'disabled' is set

  - by Jon

  Hello, When I include a 'disabled' attribute on an a4j:commandButton, the button's action is not performed. Taking the 'disabled' attribute out causes it to work properly. I am not doing any special validation (that I'm aware of) and am not seeing any validation error messages. Here is part of my page: <t:dataTable id="myTable" var="region" value="#{MyPageBackingBean.regions}" width="100%"> ... <a4j:commandButton value="Update" action="#{region.doUpdate}" oncomplete="alert('done');" disabled="#{!empty region && region.messageEmpty}" immediate="true"/> ... </t:dataTable> Any ideas? Thanks! Edit: I tried setting preserveDataModel="true" on the t:dataTable to no avail. I also made a test having an a4j:commandButton and text box with no data table, but the backing bean action is still not being fired: <h:form> <a4j:region> <a4j:outputPanel id="testregion"> <h:messages id="messages"/> <a4j:status> <f:facet name="start"> <h:graphicImage value="/images/progress_indicator.gif"/> </f:facet> </a4j:status> <h:inputTextarea rows="5" value="#{MyPageBackingBean.myValue}" style="width:100%; border: 1px solid #99CCFF;"> <a4j:support event="onkeyup" reRender="testregion" eventsQueue="messageModificationQueue" ignoreDupResponses="true" requestDelay="500"/> </h:inputTextarea> <a4j:commandButton id="doDelete" value="Delete" action="#{MyPageBackingBean.dummy}" reRender="testregion" disabled="#{empty MyPageBackingBean.myValue}"/> <h:outputText value="#{MyPageBackingBean.myValue}"/> </a4j:outputPanel> </a4j:region> </h:form> Here is the new backing bean code used for testing: private String m_myValue = null; public String getMyValue() { return m_myValue; } public void setMyValue(String value) { m_myValue = value; } private String mystr2 = null; public String dummy() { mystr2 = "hello"; return null; } Thanks!

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• Selenium Webdriver (FirefoxDriver)

  - by Samareri

  Hey all, I'm using Selenium Webdriver to do some robottesting. Since some functions appear to only work in Firefox, I'm obligated to use Firefoxdriver. Now and then, something weird happens. Starting up te driver driver = new FirefoxDriver(); driver.get(URL); gets firefox to startup but not to go to the specified url. The strange thing is that it works on another computer with the same preferences set in Firefox. I solved this problem once by changing to another version of firefox, but this time this doesn't do the trick for me, it did however worked for the other developers. Yes, the error started for all developers on the same time, same day... My first question is: is it a firefox problem or Webdriver problem. Second question: how is it possible that it works on other pc's? Any help would be very appreciated Thanks Error: org.openqa.selenium.WebDriverException: Could not parse "". System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.6.0_18' Driver info: driver.version: firefox at org.openqa.selenium.firefox.Response.<init>(Response.java:53) at org.openqa.selenium.firefox.internal.AbstractExtensionConnection.nextResponse(AbstractExtensionConnection.java:258) at org.openqa.selenium.firefox.internal.AbstractExtensionConnection.readLoop(AbstractExtensionConnection.java:220) at org.openqa.selenium.firefox.internal.AbstractExtensionConnection.waitForResponseFor(AbstractExtensionConnection.java:213) at org.openqa.selenium.firefox.internal.AbstractExtensionConnection.sendMessageAndWaitForResponse(AbstractExtensionConnection.java:162) at org.openqa.selenium.firefox.FirefoxDriver.executeCommand(FirefoxDriver.java:329) at org.openqa.selenium.firefox.FirefoxDriver.sendMessage(FirefoxDriver.java:312) at org.openqa.selenium.firefox.FirefoxDriver.sendMessage(FirefoxDriver.java:308) at org.openqa.selenium.firefox.FirefoxDriver.fixId(FirefoxDriver.java:350) at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:130) at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:109) at be.....MMCRobotTest.login(MMCRobotTest.java:98) at be.....MMCRobotTestAttribute.testNewAttribute(MMCRobotTestAttribute.java:12) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at junit.framework.TestCase.runTest(TestCase.java:164) at junit.framework.TestCase.runBare(TestCase.java:130) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:120) at junit.framework.TestSuite.runTest(TestSuite.java:230) at junit.framework.TestSuite.run(TestSuite.java:225) at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: org.json.JSONException: A JSONObject text must begin with '{' at character 0 at org.json.JSONTokener.syntaxError(JSONTokener.java:496) at org.json.JSONObject.<init>(JSONObject.java:180) at org.json.JSONObject.<init>(JSONObject.java:403) at org.openqa.selenium.firefox.Response.<init>(Response.java:41) ... 30 more

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• Playing an InputStream video in Blackberry JDE.

  - by Jenny

  I think I'm using InputStream incorrectly with a Blackberry 9000 simulator: I found some sample code, http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/1089414/How%5FTo%5F-%5FPlay%5Fvideo%5Fwithin%5Fa%5FBlackBerry%5Fsmartphone%5Fapplication.html?nodeid=1383173&vernum=0 that lets you play video from within a Blackberry App. The code claims it can handle HTTP, but it's taken some fandangling to get it to actually approach doing so: http://pastie.org/609491 Specifically, I'm doing: StreamConnection s = null; s = (StreamConnection)Connector.open("http://10.252.9.15/eggs.3gp"); HttpConnection c = (HttpConnection)s; InputStream i = c.openInputStream(); System.out.println("~~~~~I have a connection?~~~~~~" + c); System.out.println("~~~~~I have a URL?~~~~" + c.getURL()); System.out.println("~~~~~I have a type?~~~~" + c.getType()); System.out.println("~~~~~I have a status?~~~~~~" + c.getResponseCode()); System.out.println("~~~~~I have a stream?~~~~~~" + i); player = Manager.createPlayer(i, c.getType()); I've found that this is the only way I can get an InputStream from an HTTPConnection without causing a: "JUM Error 104: Uncaught NullPointer Exception". (That is, the casting as a StreamConnection, and THEN as an HttpConnection stops it from crashing). However, I'm still not streaming video. Before, a stream wasn't able to be created (it would crash with the null pointer exception). Now, a stream is being made, the debugger claims it's begining to stream video from it...and nothing happens. No video plays. The app doesn't freeze, or crash or anything. I can 'pause' and 'play' freely, and get appropriate debug messages for both. But no video shows up. If I'm playing a video stored locally on the blackberry, everything is fine (it actually plays the video), so I know the Player itself is working fine, I"m just wondering if maybe I have something wrong with my stream? The API says the player can take in an InputStream. Is there a specific kind it needs? How can I query my inputstream to know if it's valid? It existing is further than I've gotten before. -Jenny Edit: I'm on a Blackberry Bold simulator (9000). I've heard that some versions of phones do NOT stream video via HTTP, however, the Bold does. I have yet to see examples of this though. When I go to the internet and point at a blackberry playable video, it attempts to stream, and then asks me to physically download the file (and then plays fine once I download). Edit: Also, I have a physical blackberry Bold, as well, but it can't stream either (I've gone to m.youtube.com, only to get a server/content not found error). Is there something special I need to do to stream RTSP content?

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• iOS static Framework crash when animating view

  - by user1439216

  I'm encountering a difficult to debug issue with a static library project when attempting to animate a view. It works fine when debugging (and even when debugging in the release configuration), but throws an error archived as a release: Exception Type: EXC_CRASH (SIGSYS) Exception Codes: 0x00000000, 0x00000000 Crashed Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 TestApp 0x000d04fc 0x91000 + 259324 1 UIKit 0x336d777e +[UIView(UIViewAnimationWithBlocks) animateWithDuration:animations:] + 42 2 TestApp 0x000d04de 0x91000 + 259294 3 TestApp 0x000d0678 0x91000 + 259704 4 Foundation 0x355f04f8 __57-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_0 + 12 5 CoreFoundation 0x35aae540 ___CFXNotificationPost_block_invoke_0 + 64 6 CoreFoundation 0x35a3a090 _CFXNotificationPost + 1400 7 Foundation 0x355643e4 -[NSNotificationCenter postNotificationName:object:userInfo:] + 60 8 UIKit 0x33599112 -[UIInputViewTransition postNotificationsForTransitionStart] + 846 9 UIKit 0x335988cc -[UIPeripheralHost(UIKitInternal) executeTransition:] + 880 10 UIKit 0x3351bb8c -[UIPeripheralHost(UIKitInternal) setInputViews:animationStyle:] + 304 11 UIKit 0x3351b260 -[UIPeripheralHost(UIKitInternal) _reloadInputViewsForResponder:] + 952 12 UIKit 0x3351ae54 -[UIResponder(UIResponderInputViewAdditions) reloadInputViews] + 160 13 UIKit 0x3351a990 -[UIResponder becomeFirstResponder] + 452 14 UIKit 0x336194a0 -[UITextInteractionAssistant setFirstResponderIfNecessary] + 168 15 UIKit 0x33618d6a -[UITextInteractionAssistant oneFingerTap:] + 1602 16 UIKit 0x33618630 _UIGestureRecognizerSendActions + 100 17 UIKit 0x335a8d5e -[UIGestureRecognizer _updateGestureWithEvent:] + 298 18 UIKit 0x337d9472 ___UIGestureRecognizerUpdate_block_invoke_0541 + 42 19 UIKit 0x33524f4e _UIGestureRecognizerApplyBlocksToArray + 170 20 UIKit 0x33523a9c _UIGestureRecognizerUpdate + 892 21 UIKit 0x335307e2 _UIGestureRecognizerUpdateGesturesFromSendEvent + 22 22 UIKit 0x33530620 -[UIWindow _sendGesturesForEvent:] + 768 23 UIKit 0x335301ee -[UIWindow sendEvent:] + 82 24 UIKit 0x3351668e -[UIApplication sendEvent:] + 350 25 UIKit 0x33515f34 _UIApplicationHandleEvent + 5820 26 GraphicsServices 0x376d5224 PurpleEventCallback + 876 27 CoreFoundation 0x35ab651c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32 28 CoreFoundation 0x35ab64be __CFRunLoopDoSource1 + 134 29 CoreFoundation 0x35ab530c __CFRunLoopRun + 1364 30 CoreFoundation 0x35a3849e CFRunLoopRunSpecific + 294 31 CoreFoundation 0x35a38366 CFRunLoopRunInMode + 98 32 GraphicsServices 0x376d4432 GSEventRunModal + 130 33 UIKit 0x33544cce UIApplicationMain + 1074 Thread 0 crashed with ARM Thread State: r0: 0x0000004e r1: 0x000d04f8 r2: 0x338fed47 r3: 0x3f523340 r4: 0x00000000 r5: 0x2fe8da00 r6: 0x00000001 r7: 0x2fe8d9d0 r8: 0x3f54cad0 r9: 0x00000000 r10: 0x3fd00000 r11: 0x3f523310 ip: 0x3f497048 sp: 0x2fe8d988 lr: 0x33539a41 pc: 0x000d04fc cpsr: 0x60000010 To give some background info: The static library is part of an 'iOS fake-framework', built using the templates from here: https://github.com/kstenerud/iOS-Universal-Framework The framework presents a registration UI as a modal view on top of whatever the client application is doing at the time. It pushes these views using a handle to a UIViewController provided by the client application. It doesn't do anything special, but here's the animation code: -(void)keyboardWillShowNotification:(NSNotification *)notification { double animationDuration = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; dispatch_async(dispatch_get_main_queue(), ^(void) { [self animateViewsToState:kUMAnimationStateKeyboardVisible forIdiom:[UIDevice currentDevice].userInterfaceIdiom forDuration:animationDuration]; }); } -(void)animateViewsToState:(kUMAnimationState)state forIdiom:(UIUserInterfaceIdiom)idiom forDuration:(double)duration { float fieldOffset; if (idiom == UIUserInterfaceIdiomPhone) { if (state == kUMAnimationStateKeyboardVisible) { fieldOffset = -KEYBOARD_HEIGHT_IPHONE_PORTRAIT; } else { fieldOffset = KEYBOARD_HEIGHT_IPHONE_PORTRAIT; } } else { if (state == kUMAnimationStateKeyboardVisible) { fieldOffset = -IPAD_FIELD_OFFSET; } else { fieldOffset = IPAD_FIELD_OFFSET; } } [UIView animateWithDuration:duration animations:^(void) { mUserNameField.frame = CGRectOffset(mUserNameField.frame, 0, fieldOffset); mUserPasswordField.frame = CGRectOffset(mUserPasswordField.frame, 0, fieldOffset); }]; } Further printf-style debugging shows that it crashes whenever I do anything much with UIKit - specifically, it crashes when I replace -animateViewsToState with: if (0 == UIUserInterfaceIdiomPhone) { NSLog(@""); } and [[[[UIAlertView alloc] initWithTitle:@"test" message:@"123" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease] show]; To me, this sounds like a linker problem, but I don't understand how such problems would only manifest here, and not beforehand. Any help would be greatly appreciated.

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• WPF FlowDocument: force calculation of height etc. "off screen"

  - by Lars

  My target: a DocumentPaginator which takes a FlowDocument with a table, which splits the table to fit the pagesize and repeat the header/footer (special tagged TableRowGroups) on every page. For splitting the table I have to know the heights of its rows. While building the FlowDocument-table by code, the height/width of the TableRows are 0 (of course). If I assign this document to a FlowDocumentScrollViewer (PageSize is set), the heights etc. are calculated. Is this possible without using an UI-bound object? Instantiating a FlowDocumentScrollViewer which is not bound to a window doesn't force the pagination/calculation of the heights. This is how I determine the height of a TableRow (which works perfectly for documents shown by a FlowDocumentScrollViewer): FlowDocument doc = BuildNewDocument(); // what is the scrollviewer doing with the FlowDocument? FlowDocumentScrollViewer dv = new FlowDocumentScrollViewer(); dv.Document = doc; dv.Arrange(new Rect(0, 0, 0, 0)); TableRowGroup dataRows = null; foreach (Block b in doc.Blocks) { if (b is Table) { Table t = b as Table; foreach (TableRowGroup g in t.RowGroups) { if ((g.Tag is String) && ((String)g.Tag == "dataRows")) { dataRows = g; break; } } } if (dataRows != null) break; } if (dataRows != null) { foreach (TableRow r in dataRows.Rows) { double maxCellHeight = 0.0; foreach (TableCell c in r.Cells) { Rect start = c.ElementStart.GetCharacterRect(LogicalDirection.Forward); Rect end = c.ElementEnd.GetNextInsertionPosition(LogicalDirection.Backward).GetCharacterRect(LogicalDirection.Forward); double cellHeight = end.Bottom - start.Top; if (cellHeight > maxCellHeight) maxCellHeight = cellHeight; } System.Diagnostics.Trace.WriteLine("row " + dataRows.Rows.IndexOf(r) + " = " + maxCellHeight); } } Edit: I added the FlowDocumentScrollViewer to my example. The call of "Arrange" forces the FlowDocument to calculate its heights etc. I would like to know, what the FlowDocumentScrollViewer is doing with the FlowDocument, so I can do it without the UIElement. Is it possible?

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• Best programming aids for a quadriplegic programmer

  - by Peter Rowell

  Before you jump to conclusions, yes, this is programming related. It covers a situation that comes under the heading of, "There, but for the grace of God, go you or I." This is brand new territory for me so I'm asking for some serious help here. A young man, Honza Ripa, in a nearby town did the classic Dumb Thing two weeks after graduating from High School -- he dove into shallow water in the Russian River and had a C-4/C-5 break, sometimes called a Swimming Pool break. In a matter of seconds he went from an exceptional golfer and wrestler to a quadriplegic. (Read the story ... all of us should have been so lucky as to have a girlfriend like Brianna.) That was 10 months ago and he has regained only tiny amounts of control of his right index finger and a couple of other hand/foot motions, none of them fine-grained. His total control of his computer (currently running Win7, but we can change that as needed) is via voice command. Honza's not dumb. He had a 3.7 GPA with AP math and physics. The Problems: Since all of his input is via voice command, he is concerned that the predominance of special characters in programming will require vast amount of verbose commands. Does anyone know of any well done voice input system specifically designed for programmers? I'm thinking about something that might be modal--e.g. you say "Python input" and it goes into a macro mode for doing class definitions, etc. Given all of the RSI in programmer-land there's got to be something out there. What OS(es) does it run on? I am planning on teaching him Python, which is my preferred language for programming and teaching. Are there any applications / whatevers that are written in Python and would be a particularly good match for engaging him mentally while supporting his disability? One of his expressed interests is in stock investing, but that not might be a good starting point for a brand-new programmer. There are a lot of environments (Flash, JavaScript, etc) that are not particularly friendly to people with accessibility challenges. I vaguely remember (but cannot find) a research project that basically created an overlay system on top of a screen environment and then allowed macro command construction on top of the screen image. If we can get/train this system, we may be able to remove many hurdles to using the net. I am particularly interested in finding open source Python-based robotics and robotic prostheses projects so that he can simultaneously learn advanced programming concepts while learning to solve some of his own immediate problems. I've done a ton of googling on this, but I know there things I'm missing. I'm asking the SO community to step up to the plate here. I know this group has the answers, so let me hear them! Overwhelm me with the opportunities that any of us might have/need to still program after such a life-changing event.

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• ZPL II Extended Characters

  - by Mauro

  I'm trying to print extended code page 850 characters using ZPL II to a Zebra S4M. Whenever one of the extended characters I.E. ASCII value 127 is used I get a box of varying shades of grey instead of the actual value. I'm trying to print ± and ° (ALT+0177 and ALT+0176). I suspect its the RawPrinterHelper I am trying to use (as downloaded from MS, and another from CodeProject) however I cant see where the character codes are going wrong. Weirdly, printing direct from Notepad renders the correct characters, which leads me to believe it is a problem with the raw printer helper class. I am not tied to using the Raw Printer Helper class so if there is a better way of doing it, I am more than happy to see them. SAMPLE ZPLII Without escaped chars ^XA ^FO30,200^AD^FH,18,10^FD35 ± 2 ° ^FS ^FS ^XZ With escaped chars (tried both upper and lower case) ^XA ^FO30,200^AD^FH,18,10^FD35 _b0 2 _b1 ^FS ^FS ^XZ Raw Printer Helper [StructLayout(LayoutKind.Sequential)] public struct DOCINFO { [MarshalAs(UnmanagedType.LPWStr)] public string printerDocumentName; [MarshalAs(UnmanagedType.LPWStr)] public string pOutputFile; [MarshalAs(UnmanagedType.LPWStr)] public string printerDocumentDataType; } public class RawPrinter { [ DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall)] public static extern long OpenPrinter(string pPrinterName, ref IntPtr phPrinter, int pDefault); [ DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall)] public static extern long StartDocPrinter(IntPtr hPrinter, int Level, ref DOCINFO pDocInfo); [ DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern long StartPagePrinter(IntPtr hPrinter); [ DllImport("winspool.drv", CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern long WritePrinter(IntPtr hPrinter, string data, int buf, ref int pcWritten); [ DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern long EndPagePrinter(IntPtr hPrinter); [ DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern long EndDocPrinter(IntPtr hPrinter); [ DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern long ClosePrinter(IntPtr hPrinter); public static void SendToPrinter(string printerJobName, string rawStringToSendToThePrinter, string printerNameAsDescribedByPrintManager) { IntPtr handleForTheOpenPrinter = new IntPtr(); DOCINFO documentInformation = new DOCINFO(); int printerBytesWritten = 0; documentInformation.printerDocumentName = printerJobName; documentInformation.printerDocumentDataType = "RAW"; OpenPrinter(printerNameAsDescribedByPrintManager, ref handleForTheOpenPrinter, 0); StartDocPrinter(handleForTheOpenPrinter, 1, ref documentInformation); StartPagePrinter(handleForTheOpenPrinter); WritePrinter(handleForTheOpenPrinter, rawStringToSendToThePrinter, rawStringToSendToThePrinter.Length, ref printerBytesWritten); EndPagePrinter(handleForTheOpenPrinter); EndDocPrinter(handleForTheOpenPrinter); ClosePrinter(handleForTheOpenPrinter); } }

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• JQuery dialog momentairly displayed on page load

  - by Kevin Won

  I created a page that has a JQuery based dialog using the standard JQuery UI function. I do this with out of the box functionality of JQuery... nothing special at all. Here is my HTML for the dialog: <div id = "myDialog"> <!-- ... more html in here for the dialog --> </div> Then the JQuery called in javascript that transforms the <div> to a dialog: // pruned .js as an example of kicking up a JQuery dialog $('#myDialog').dialog({ autoOpen: false, title: 'Title here', modal: true } }); Again, plain-vanilla JQuery. So you start this wizard by clicking on a link on the parent page, and it then spawns a JQuery dialog which has a significant chunk of HTML that includes images, etc. As I continued developing this page, I started to notice that when I loaded the page in the browser that the <div> tags I was putting in that JQuery transforms into dialogs would very briefly be displayed. Then the page would act as expected. In other words, the dialog would not be hidden, it would be displayed briefly in-line in the page. Quite ugly and unprofessional looking! But after a split second, the page would render correctly and look just as I expected/wanted. Over time, as the page size grew, the time the page would remain incorrectly rendered grew. My guess is that the rendering engine of the browser is rendering the page as it is loading, then at the end it is kicking off the JQuery that will transform the <div> into a dialog. This JQuery function will then transform the simple <div> to a JQuery dialog and hide it (since I have the autoOpen property set to false). Some browsers <cough>IE</cough> display it longer than others. My large-ish dialog now causes the page to incorrectly render for about 1 second... YUCK! I came up with a resolution to this problem which works OK, but I'm wondering if someone knows of a better way.

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• Fluid CSS: floating column with max-width and overflow

  - by Ates Goral

  I'm using a fluid layout in the new theme that I'm working on for my blog. I often blog about code and include <pre> blocks within the posts. The float: left column for the content area has a max-width so that the column stops at a certain maximum width and can also be shrunk: +----------+ +------+ | text | | text | | | | | | | | | | | | | | | | | | | | | +----------+ +------+ max shrunk What I want is for the <pre> elements to be wider than the text column so that I can fit 80-character-wrapped code without horizontal scroll bars. But I want the <pre> elements to overflow from the content area, without affecting its fluidity: +----------+ +------+ | text | | text | | | | | +----------+--+ +------+------+ | code | | code | +----------+--+ +------+------+ | | | | +----------+ +------+ max shrunk But, max-width stops being fluid once I insert the overhanging <pre> in there: the width of the column remains at the specified max-width even when I shrink the browser beyond that width. I've reproduced the issue with this bare-minimum scenario: <div style="float: left; max-width: 460px; border: 1px solid red"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit</p> <pre style="max-width: 700px; border: 1px solid blue"> function foo() { // Lorem ipsum dolor sit amet, consectetur adipisicing elit } </pre> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit</p> </div> I noticed that doing either of the following brings back the fluidity: Remove the <pre> (doh...) Remove the float: left The workaround I'm currently using is to insert the <pre> elements into "breaks" in the post column, so that the widths of the post segments and the <pre> segments are managed mutually exclusively: +----------+ +------+ | text | | text | +----------+ +------+ +-------------+ +-------------+ | code | | code | +-------------+ +-------------+ +----------+ +------+ +----------+ +------+ max shrunk But this forces me to insert additional closing and opening <div> elements into the post markup which I'd rather keep semantically pristine. Admittedly, I don't have a full grasp of how the box model works with floats with overflowing content, so I don't understand why the combination of float: left on the container and the <pre> inside it cripple the max-width of the container. I'm observing the same problem on Firefox/Chrome/Safari/Opera. IE6 (the crazy one) seems happy all the time. This also doesn't seem dependent on quirks/standards mode. Update I've done further testing to observe that max-width seems to get ignored when the element has a float: left. I glanced at the W3C box model chapter but couldn't immediately see an explicit mention of this behaviour. Any pointers?

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• How can I do something ~after~ an event has fired in C#?

  - by Siracuse

  I'm using the following project to handle global keyboard and mouse hooking in my C# application. This project is basically a wrapper around the Win API call SetWindowsHookEx using either the WH_MOUSE_LL or WH_KEYBOARD_LL constants. It also manages certain state and generally makes this kind of hooking pretty pain free. I'm using this for a mouse gesture recognition software I'm working on. Basically, I have it setup so it detects when a global hotkey is pressed down (say CTRL), then the user moves the mouse in the shape of a pre-defined gesture and then releases global hotkey. The event for the KeyDown is processed and tells my program to start recording the mouse locations until it receives the KeyUp event. This is working fine and it allows an easy way for users to enter a mouse-gesture mode. Once the KeyUp event fires and it detects the appropriate gesture, it is suppose to send certain keystrokes to the active window that the user has defined for that particular gesture they just drew. I'm using the SendKeys.Send/SendWait methods to send output to the current window. My problem is this: When the user releases their global hotkey (say CTRL), it fires the KeyUp event. My program takes its recorded mouse points and detects the relevant gesture and attempts to send the correct input via SendKeys. However, because all of this is in the KeyUp event, that global hotkey hasn't finished being processed. So, for example if I defined a gesture to send the key "A" when it is detected, and my global hotkey is CTRL, when it is detected SendKeys will send "A" but while CTRL is still "down". So, instead of just sending A, I'm getting CTRL-A. So, in this example, instead of physically sending the single character "A" it is selecting-all via the CTRL-A shortcut. Even though the user has released the CTRL (global hotkey), it is still being considered down by the system. Once my KeyUp event fires, how can I have my program wait some period of time or for some event so I can be sure that the global hotkey is truly no longer being registered by the system, and only then sending the correct input via SendKeys?

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