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• Windows 2003 Server Caching

  - by pablomedok

  We're experiencing almost everyday table index corruption on Windows Server 2003. We are running an old application which uses DBF/CDX tables. Everything was fine for ages, but 6 months after we've installed Advantage Database Server (which allows access to some tables to our website) we started to get index corruption problems. And we don't know whom to blame. We've tried to exclude all possible causes of this corruption. Now all users work in terminal mode - so no network problems can cause that, OpLocks also can't be a reason. We changed hardware, network cards, switches, reainstalled Server and even moved to new dedicated server. The only thing we can't exclude is ADS - because it should be working. Is that possible that local read/write caching that causes that problem? E.g. one user or process uses cached data, later another user/process changes it, and later the first user changes it again without knowing about the first change. Is it possible theoretically? Is it possible that this problem is caused by imporper file server or caching settings? Is it possible that normal users use non-cached data and ADS is using cached data? Or vice versa? Is it possible that each terminal user has its own cache? Or maybe the problem is about RAID caching somehow interfering with Windows Server caching? Or maybe there are some special settings for Windows Server for working with DBF tables that are being written simultaneously by several terminal users? Maybe there is a way to turn off caching for some certain files to check it? Sometimes we get index crash twice a day, sometimes everything is fine for 5 days in a row. Today only one user was working in the evening with the database (usually there are 30-50 users are working simultaneously on working hours). So it's almost zero load on server. , Syncronization with website is performed every 5 minutes during work hours and every 15 minutes in the evening and on weekend. We've done file access auditing and it shows that during website syncroniztions ADS server opens the table and index files for ReadEA and WriteEA though it performs only SELECT queries. ADS does UPDATE/INSERT queries but less freqently - not during regular synchronizations, but only when an order is placed by website visitor). Please help me. We are struggling with this problem for almost a year and still can't find any pattern or any clue about this problem. Here is my previous qestion about this issue on DBA: http://dba.stackexchange.com/questions/8646/foxpro-dbf-index-corruption

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• Apache's htcacheclean doesn't scale: How to tame a huge Apache disk_cache?

  - by flight

  We have an Apache setup with a huge disk_cache (500.000 entries, 50 GB disk space used). The cache grows by 16 GB every day. My problem is that the cache seems to be growing nearly as fast as it's possible to remove files and directories from the cache filesystem! The cache partition is an ext3 filesystem (100GB, "-t news") on an iSCSI storage. The Apache server (which acts as a caching proxy) is a VM. The disk_cache is configured with CacheDirLevels=2 and CacheDirLength=1, and includes variants. A typical file path is "/htcache/B/x/i_iGfmmHhxJRheg8NHcQ.header.vary/A/W/oGX3MAV3q0bWl30YmA_A.header". When I try to call htcacheclean to tame the cache (non-daemon mode, "htcacheclean-t -p/htcache -l15G"), IOwait is going through the roof for several hours. Without any visible action. Only after hours, htcacheclean starts to delete files from the cache partition, which takes a couple more hours. (A similar problem was brought up in the Apache mailing list in 2009, without a solution: http://www.mail-archive.com/[email protected]/msg42683.html) The high IOwait leads to problems with the stability of the web server (the bridge to the Tomcat backend server sometimes stalls). I came up with my own prune script, which removes files and directories from random subdirectories of the cache. Only to find that the deletion rate of the script is just slightly higher than the cache growth rate. The script takes ~10 seconds to read the a subdirectory (e.g. /htcache/B/x) and frees some 5 MB of disk space. In this 10 seconds, the cache has grown by another 2 MB. As with htcacheclean, IOwait goes up to 25% when running the prune script continuously. Any idea? Is this a problem specific to the (rather slow) iSCSI storage? Should I choose a different file system for a huge disk_cache? ext2? ext4? Are there any kernel parameter optimizations for this kind of scenario? (I already tried the deadline scheduler and a smaller read_ahead_kb, without effect).

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• How to unmangle PDF format into a usable text or spreadsheet document?

  - by Chuck

  Upon requesting some daily/hourly sales data from a coworker who is responsible for such requests, I was given a series of PDF files. The point of sale program that is used, for some reason, answers requests for this type of information in the form of PDF files. The issue: The PDF files look to be in a format that should easily be copy and pasted into a spreadsheet. There are three columns that look to be neatly organized across two pages. When copy/pasting the first page, all three columns from the PDF's first page are dumped into a single column consisting of the Date followed by the Hours for the transactions on that day. The end of this Date/Time information is followed by all of the Total Sales values that should be attached a Date and Time of the transaction. (NOTE: There are no duplicated Dates in the Date column, ie, Multiple transactions for a day only have one yyyy/mm/dd listed for the first row but not the following rows.) While it was a huge pain, it was possible to, in about four or five steps, get the single column of data broken out into three columns that matched the PDF. The second page of the PDF file, when attempting to copy/paste into a spreadsheet, creates a single column with the first third of the cells being the Dates from the PDF, the second third of the cells being the Hours of the transactions and the final third of the cells being filled with the Total Sales. After the copy/paste there is no way to figure out which Hours belong to which Dates or Total Sales due to the lack of the duplicated Dates in the Date column as mentioned above. My PDF-fu is next to non-existent. I've just now started to work with PDF editors and some www.convertmyPDFforfree.com websites, so far, with absolutely nothing remotely coming anywhere near usable output. (Both methods have so far done nothing but product blank documents.) Before I go back and pester my co-worker into figuring out a way to create a report in some other format than PDF, is there any method by which to take the data that looks to be formatted correctly in a PDF and copy/paste it into a spreadsheet that will look the same? I appreciate any help that can be made available. The sales data isn't so sensitive that I couldn't part with a bit to let somebody actually see what it is that needs to be dealt with, just let me know. The PDF's are less than 100kb each so sending them shouldn't be a burden to any interested party.

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• Creating a fallback error page for nginx when root directory does not exist

  - by Ruirize

  I have set up an any-domain config on my nginx server - to reduce the amount of work needed when I open a new site/domain. This config allows me to simply create a folder in /usr/share/nginx/sites/ with the name of the domain/subdomain and then it just works.™ server { # Catch all domains starting with only "www." and boot them to non "www." domain. listen 80; server_name ~^www\.(.*)$; return 301 $scheme://$1$request_uri; } server { # Catch all domains that do not start with "www." listen 80; server_name ~^(?!www\.).+; client_max_body_size 20M; # Send all requests to the appropriate host root /usr/share/nginx/sites/$host; index index.html index.htm index.php; location / { try_files $uri $uri/ =404; } recursive_error_pages on; error_page 400 /errorpages/error.php?e=400&u=$uri&h=$host&s=$scheme; error_page 401 /errorpages/error.php?e=401&u=$uri&h=$host&s=$scheme; error_page 403 /errorpages/error.php?e=403&u=$uri&h=$host&s=$scheme; error_page 404 /errorpages/error.php?e=404&u=$uri&h=$host&s=$scheme; error_page 418 /errorpages/error.php?e=418&u=$uri&h=$host&s=$scheme; error_page 500 /errorpages/error.php?e=500&u=$uri&h=$host&s=$scheme; error_page 501 /errorpages/error.php?e=501&u=$uri&h=$host&s=$scheme; error_page 503 /errorpages/error.php?e=503&u=$uri&h=$host&s=$scheme; error_page 504 /errorpages/error.php?e=504&u=$uri&h=$host&s=$scheme; location ~ \.(php|html) { include /etc/nginx/fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_intercept_errors on; } } However there is one issue that I'd like to resolve, and that is when a domain that doesn't have a folder in the sites directory, nginx throws an internal 500 error page because it cannot redirect to /errorpages/error.php as it doesn't exist. How can I create a fallback error page that will catch these failed requests?

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• Tips for maximizing Nginx requests/sec?

  - by linkedlinked

  I'm building an analytics package, and project requirements state that I need to support 1 billion hits per day. Yep, "billion". In other words, no less than 12,000 hits per second sustained, and preferably some room to burst. I know I'll need multiple servers for this, but I'm trying to get maximum performance out of each node before "throwing more hardware at it". Right now, I have the hits-tracking portion completed, and well optimized. I pretty much just save the requests straight into Redis (for later processing with Hadoop). The application is Python/Django with a gunicorn for the gateway. My 2GB Ubuntu 10.04 Rackspace server (not a production machine) can serve about 1200 static files per second (benchmarked using Apache AB against a single static asset). To compare, if I swap out the static file link with my tracking link, I still get about 600 requests per second -- I think this means my tracker is well optimized, because it's only a factor of 2 slower than serving static assets. However, when I benchmark with millions of hits, I notice a few things -- No disk usage -- this is expected, because I've turned off all Nginx logs, and my custom code doesn't do anything but save the request details into Redis. Non-constant memory usage -- Presumably due to Redis' memory managing, my memory usage will gradually climb up and then drop back down, but it's never once been my bottleneck. System load hovers around 2-4, the system is still responsive during even my heaviest benchmarks, and I can still manually view http://mysite.com/tracking/pixel with little visible delay while my (other) server performs 600 requests per second. If I run a short test, say 50,000 hits (takes about 2m), I get a steady, reliable 600 requests per second. If I run a longer test (tried up to 3.5m so far), my r/s degrades to about 250. My questions -- a. Does it look like I'm maxing out this server yet? Is 1,200/s static files nginx performance comparable to what others have experienced? b. Are there common nginx tunings for such high-volume applications? I have worker threads set to 64, and gunicorn worker threads set to 8, but tweaking these values doesn't seem to help or harm me much. c. Are there any linux-level settings that could be limiting my incoming connections? d. What could cause my performance to degrade to 250r/s on long-running tests? Again, the memory is not maxing out during these tests, and HDD use is nil. Thanks in advance, all :)

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• How to run a restricted set of programs with Administrator privileges without giving up Admin acces (Win7 Pro)

  - by frLich

  I have a shared system, running Windows7 X64, restricted to a 'standard user' with no password. Not everyone who has access to the system has the administrator password. This works rather well, except for some applications - specially the unlock-applications for encrypted hard drives/USB flash drives. The specific ones either require Administrator access (eg. Seagate Blackarmor) or simply fail without it -- since these programs are sending raw commands to a device, this is to be expected. I would like to be able to add the hashes of these particular programs to a whitelist, and have them run as administrator without needing any prompts. Since these are by definition on removable media, I can't simply use a filename or even a path. One of the users who shares the system can be considered 'crafty', so anything which temporarily grants administrator rights to an user account is certain to cause problems. What i'd like to be able to do: 1) Create an admin account that can only run programs from a whitelist (or, failing that, from a directory) I can't find a good way to do this: As far as I can tell, SRP applies equally to ALL users? Even if I put a "Deny" token on all directories on the system, such that new directories would inherit it, it could still potentially run things from the mounted USB devices. I also don't know whether it's possible to create a new directory that DOESN'T inherit from the parent, that would lake the deny token, and provide admin access. 2) Find a lightweight service that will run these programs in its local context Windows7 seems to block cross-privilege level communication by default, and I haven't found such for windows 7. One example seems to be "sudo" (http://pages.cpsc.ucalgary.ca/~nfriess/sudo/) but because it uses a WLNOTIFY hook, it won't work under Vista nor Windows7 Non-Solutions: - RunAs: Requires administrator password! (but everyone calls it "sudo" anyway) - RunAs /savecred: Nice idea, but appears to be completely insecure. - RUNASSPC - Same concept as RunAs, uses "encrypted" files with credentials, but checks in user-space. - Scheduled Tasks - "Fixed" permissions make this difficult, and doesn't support interactive processes even if it did. - SuRun: From Google: "Surun uses its own Windows service that adds the user to the group of administrators during program start and removes him automatically from that group again"

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• Nginx SSL redirect for one specific page only

  - by jjiceman

  I read and followed this question in order to configure nginx to force SSL for one page (admin.php for XenForo), and it is working well for a few of the site administrators but is not for myself. I was wondering if anyone has any advice on how to improve this configuration: ... ssl_certificate example.net.crt; ssl_certificate_key example.key; server { listen 80 default; listen 443 ssl; server_name www.example.net example.net; access_log /srv/www/example.net/logs/access.log; error_log /srv/www/example.net/logs/error.log; root /srv/www/example.net/public_html; index index.php index.html; location / { if ( $scheme = https ){ rewrite ^ http://example.net$request_uri? permanent; } try_files $uri $uri/ /index.php?$uri&$args; index index.php index.html; } location ^~ /admin.php { if ( $scheme = http ) { rewrite ^ https://example.net$request_uri? permanent; } try_files $uri /index.php; include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS on; } location ~ \.php$ { try_files $uri /index.php; include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS off; } } ... It seems that the extra information in the location ^~ /admin.php block is unecessary, does anyone know of an easy way to avoid duplicate code? Without it it skips the php block and just returns the php files. Currently it applies https correctly in Firefox when I navigate to admin.php. In Chrome, it downloads the admin.php page. When returning to the non-https website in Firefox, it does not correctly return to http but stays as SSL. Like I said earlier, this only happens for me, the other admins can go back and forth without a problem. Is this an issue on my end that I can fix? And does anyone know of any ways I could reduce duplicate configuration options in the configuration? Thanks in advance! EDIT: Clearing the cache / cookies seemed to work. Is this the right way to do http/https redirection? I sort of made it up as I went along.

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• Informaton of pendriver with libudv on linux

  - by Catanzaro

  I'm doing a little app in C that read the driver information of my pendrive: Plugged it and typed dmesg: [ 7676.243994] scsi 7:0:0:0: Direct-Access Lexar USB Flash Drive 1100 PQ: 0 ANSI: 0 CCS [ 7676.248359] sd 7:0:0:0: Attached scsi generic sg2 type 0 [ 7676.256733] sd 7:0:0:0: [sdb] 7831552 512-byte logical blocks: (4.00 GB/3.73 GiB) [ 7676.266559] sd 7:0:0:0: [sdb] Write Protect is off [ 7676.266566] sd 7:0:0:0: [sdb] Mode Sense: 43 00 00 00 [ 7676.266569] sd 7:0:0:0: [sdb] Assuming drive cache: write through [ 7676.285373] sd 7:0:0:0: [sdb] Assuming drive cache: write through [ 7676.285383] sdb: sdb1 [ 7676.298661] sd 7:0:0:0: [sdb] Assuming drive cache: write through [ 7676.298667] sd 7:0:0:0: [sdb] Attached SCSI removable disk with "udevadm info -q all -n /dev/sdb" P: /devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host7/target7:0:0/7:0:0:0/block/sdb N: sdb W: 36 S: block/8:16 S: disk/by-id/usb-Lexar_USB_Flash_Drive_AA5OCYQII8PSQXBB-0:0 S: disk/by-path/pci-0000:02:03.0-usb-0:1:1.0-scsi-0:0:0:0 E: UDEV_LOG=3 E: DEVPATH=/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host7/target7:0:0/7:0:0:0/block/sdb E: MAJOR=8 E: MINOR=16 E: DEVNAME=/dev/sdb E: DEVTYPE=disk E: SUBSYSTEM=block E: ID_VENDOR=Lexar E: ID_VENDOR_ENC=Lexar\x20\x20\x20 E: ID_VENDOR_ID=05dc E: ID_MODEL=USB_Flash_Drive E: ID_MODEL_ENC=USB\x20Flash\x20Drive\x20 E: ID_MODEL_ID=a813 E: ID_REVISION=1100 E: ID_SERIAL=Lexar_USB_Flash_Drive_AA5OCYQII8PSQXBB-0:0 E: ID_SERIAL_SHORT=AA5OCYQII8PSQXBB E: ID_TYPE=disk E: ID_INSTANCE=0:0 E: ID_BUS=usb E: ID_USB_INTERFACES=:080650: E: ID_USB_INTERFACE_NUM=00 E: ID_USB_DRIVER=usb-storage E: ID_PATH=pci-0000:02:03.0-usb-0:1:1.0-scsi-0:0:0:0 E: ID_PART_TABLE_TYPE=dos E: UDISKS_PRESENTATION_NOPOLICY=0 E: UDISKS_PARTITION_TABLE=1 E: UDISKS_PARTITION_TABLE_SCHEME=mbr E: UDISKS_PARTITION_TABLE_COUNT=1 E: DEVLINKS=/dev/block/8:16 /dev/disk/by-id/usb-Lexar_USB_Flash_Drive_AA5OCYQII8PSQXBB-0:0 /dev/disk/by-path/pci-0000:02:03.0-usb-0:1:1.0-scsi-0:0:0:0 and my software is: Codice: Seleziona tutto #include <stdio.h> #include <libudev.h> #include <stdlib.h> #include <locale.h> #include <unistd.h> int main(void) { struct udev_enumerate *enumerate; struct udev_list_entry *devices, *dev_list_entry; struct udev_device *dev; /* Create the udev object */ struct udev *udev = udev_new(); if (!udev) { printf("Can't create udev\n"); exit(0); } enumerate = udev_enumerate_new(udev); udev_enumerate_add_match_subsystem(enumerate, "scsi_generic"); udev_enumerate_scan_devices(enumerate); devices = udev_enumerate_get_list_entry(enumerate); udev_list_entry_foreach(dev_list_entry, devices) { const char *path; /* Get the filename of the /sys entry for the device and create a udev_device object (dev) representing it */ path = udev_list_entry_get_name(dev_list_entry); dev = udev_device_new_from_syspath(udev, path); /* usb_device_get_devnode() returns the path to the device node itself in /dev. */ printf("Device Node Path: %s\n", udev_device_get_devnode(dev)); /* The device pointed to by dev contains information about the hidraw device. In order to get information about the USB device, get the parent device with the subsystem/devtype pair of "usb"/"usb_device". This will be several levels up the tree, but the function will find it.*/ dev = udev_device_get_parent_with_subsystem_devtype( dev, "block", "disk"); if (!dev) { printf("Errore\n"); exit(1); } /* From here, we can call get_sysattr_value() for each file in the device's /sys entry. The strings passed into these functions (idProduct, idVendor, serial, etc.) correspond directly to the files in the directory which represents the USB device. Note that USB strings are Unicode, UCS2 encoded, but the strings returned from udev_device_get_sysattr_value() are UTF-8 encoded. */ printf(" VID/PID: %s %s\n", udev_device_get_sysattr_value(dev,"idVendor"), udev_device_get_sysattr_value(dev, "idProduct")); printf(" %s\n %s\n", udev_device_get_sysattr_value(dev,"manufacturer"), udev_device_get_sysattr_value(dev,"product")); printf(" serial: %s\n", udev_device_get_sysattr_value(dev, "serial")); udev_device_unref(dev); } /* Free the enumerator object */ udev_enumerate_unref(enumerate); udev_unref(udev); return 0; } the problem is that i obtain in output: Device Node Path: /dev/sg0 Errore and dont view information. subsystem and the devtype i think that are inserted well : "block" and "disk". thanks for help. Bye

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• Wifi network stopped being visible (and usable) (Linksys wag320n)

  - by s427

  Basically, my wifi network simply stopped working for no apparent reason. It doesn't appear in the list of the available networks anymore. I can see all my neighbors' networks, but not mine. It's as if it doesn't exist anymore. The internet connection (non-wifi), which goes through the same modem/router, is fine though. I already had a similar problem about one year ago (see here: Wifi network SSID not visible ), just after buying this very modem. I finally got it to work after performing two factory resets and getting rid of the Cisco "Magic" software; but this time it's not working. I use a linksys router-modem (WAG320N) which is directly connected (via network cable) to my desktop computer (Windows 7). I have (mainly) two devices that use the wifi network: my phone (Samsung Galaxy Nexus) and an Asus tablet (TF201, aka Transformer Prime). I also resurrected an old laptop computer (Dell, running Windows XP) to test that, and it doesn't see anything either (apart from the 20 other wifi networks, of course ^^). This wifi network was working just fine and has been for about a year. I haven't touched the modem settings so I have no idea what's causing the problem. I tried: making my phone "forget" about my network, hoping it would see it again after that: no luck. re-entering the network informations (SSID/password) manually on my phone: still no luck (says it's not in range) exporting the modem configuration, resetting the modem (factory reset, via modem admin), restarting it, importing the configuration: nope. factory reset, turning it off for 15 minutes, restarting, re-factory reset, and entering the configuration manually: still nothing. Has anybody experienced something similar before? Have you any suggestion to fix that? Thanks in advance. PS: to clear things up, here are the settings of my modem regarding wifi: Basic wireless settings: Configuration: manual Radio Band: 2.4GHz Wireless Network Mode: B/G/N-Mixed SSID: s427 Channel Bandwidth: Wide - 40 MHz Channel Wide Channel: 9 - 2.452GHz Standard Channel: 11 - 2.462GHz SSID Broadcast: Enable Advanced Wireless Settings AP Isolation: Disable Authentication Type: Auto Basic Rate: Default Transmission Rate: Auto N Transmission Rate: Auto CTS Protection Mode: Disable Beacon Interval: 100 DTIM Interval: 1 Fragmentation Threshold: 2346 RTS Threshold: 2346

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• [CentOS 4.8] nslookup resolves domains to IPs, but I can't get a response to pings to external servers

  - by Beco

  I have a fresh install of CentOS 4.8 running on an internal development server. I haven't done anything to it besides setting up sudoers and SSH. I can SSH into the server and from there resolve domains to IPs and ping internal servers, but for some reason I don't get any response from pinging external servers. The software firewall is disabled, and the problem is present with both static and DHCP-assigned network configurations. The network domain controller is a Windows Server 2003 box. $ nslookup google.com Server: 10.254.2.5 Address: 10.254.2.5#53 Non-authoritative answer: Name: google.com Address: 74.125.47.147 Name: google.com Address: 74.125.47.99 <etc...> 10.254.2.5 is the Win2K3 server. $ ping google.com PING google.com (74.125.47.106) 56(84) bytes of data. It just hangs here indefinitely. $ cat /etc/resolv.conf ; generated by /sbin/dhclient-script search <...snip...>.local nameserver 10.254.2.5 nameserver 10.254.2.124 10.254.2.124 is the backup DC server, which is currently off and tombstoned by this point. The snipped section is our company name. # ifconfig eth0 Link encap:Ethernet HWaddr <snip> inet addr:10.254.2.101 Bcast:10.254.2.255 Mask:255.255.255.0 inet6 addr: <snip>/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:80066 errors:0 dropped:0 overruns:0 frame:0 TX packets:4421 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7810133 (7.4 MiB) TX bytes:590550 (576.7 KiB) Interrupt:225 Base address:0xc000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:32 errors:0 dropped:0 overruns:0 frame:0 TX packets:32 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:8104 (7.9 KiB) TX bytes:8104 (7.9 KiB) # route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.254.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 10.254.2.5 0.0.0.0 UG 0 0 0 eth0 And, for good measure, a snapshot of the current ethernet config via the system-config-network GUI. Edit: I don't yet have enough rep to post images, so here's a link. Sorry! system-config-network snapshot I'm pretty green when it comes to setting up *nix dev servers and network configuration in general, so please let me know if I've left out critical information, or posted information I shouldn't have posted. Thanks!

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• Wrapping a point-to-point link

  - by user3712955

  I'm using a pair of IP radios (non-WiFi) to bridge my office engineering LAN (172.0.0.0/8) to a lab in another building. The radios work fine, but they expose a web management interface I'd like to hide, and they also generate traffic (ARP, STP, and more) that I need to keep off my (very, very clean) LAN segments. I have some ARM-Linux boards (similar to Beagle/Panda/RasPi) running Ubuntu, and I've put one at each end of the link, between the radio and the LAN. Each of the boards has 2 wired Ethernet interfaces, eth0 and eth1. The LAN segments are connected to eth0, and the radios are connected to eth1. I'd like to accomplish the following: Keep radio-originated traffic off my LAN segments! Hide all services provided by the radio (web, ssh, etc.) Transparently pass all traffic between the LAN segments (including things like ARP). The above also applies to the ARM-Linux boards: No stray traffic my LAN from them either! I'd like the system to look like a switch: LAN packets arriving at one eth0 appear at the other. And neither eth0 should have an IP address: The working system should behave like a CAT6 cable with some latency (instead of ARM boards and radios). Unfortunately, I'm confused about how to properly configure the ARM Ubuntu systems. What I'm guessing I need is a bridge on each board (br0?) and a VLAN (vlan0 or eth0.0?) to isolate the LAN traffic from everything else as it passes through the ARM boards and the radios. Then I need some kind of a firewall to block sending anything out eth0 that isn't from the other eth0 (via the VLAN). I've looked at the ip and ebtables commands (especially -t broute). While the concepts sorta-kinda make sense, I'm completely lost in the details. Edit: In the perverse case that a system on one of my LAN segments has the same IP address as one of the radios, or as eth1 on the ARM-Ubuntu boards, a VLAN won't work. Which I believe means I need to tunnel all traffic between the two eth0 interfaces to get that "like a wire" behavior. Help? Finally, I'd like to have a way to temporarily expose services on the ARM boards (ssh) and the radios (web) for maintenance purposes. Ideally, it would expose an IP address with ssh available on port 22. Once connected, I figure I'd start an X11 session and run a browser on the ARM board to access the radios. Or something. I could login via the console to enable/disable this, or perhaps could use a GPIO to trigger a script. I feel I've identified most of the pieces needed to make all this happen, but I have no idea how to combine them to make a working system. Thanks!

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• C# WebBrowser control not applying css

  - by JamesL

  I have a project that I am working on in VS2005. I have added a WebBrowser control. I add a basic empty page to the control private const string _basicHtmlForm = "<html> " + "<head> " + "<meta http-equiv='Content-Type' content='text/html; charset=utf-8'/> " + "<title>Test document</title> " + "<script type='text/javascript'> " + "function ShowAlert(message) { " + " alert(message); " + "} " + "</script> " + "</head> " + "<body><div id='mainDiv'> " + "</div></body> " + "</html> "; private string _defaultFont = "font-family: Arial; font-size:10pt;"; private void LoadWebForm() { try { _webBrowser.DocumentText = _basicHtmlForm; } catch(Exception ex) { MessageBox.Show(ex.Message); } } and then add various elements via the dom (using _webBrowser.Document.CreateElement). I am also loading a css file: private void AddStyles() { try { mshtml.HTMLDocument currentDocument = (mshtml.HTMLDocument) _webBrowser.Document.DomDocument; mshtml.IHTMLStyleSheet styleSheet = currentDocument.createStyleSheet("", 0); TextReader reader = new StreamReader(Path.Combine(Path.GetDirectoryName(Application.ExecutablePath),"basic.css")); string style = reader.ReadToEnd(); styleSheet.cssText = style; } catch(Exception ex) { MessageBox.Show(ex.Message); } } Here is the css page contents: body { background-color: #DDDDDD; } .categoryDiv { background-color: #999999; } .categoryTable { width:599px; background-color:#BBBBBB; } #mainDiv { overflow:auto; width:600px; } The style page is loading successfully, but the only elements on the page that are being affected are the ones that are initially in the page (body and mainDiv). I have also tried including the css in a element in the header section, but it still only affects the elements that are there when the page is created. So my question is, does anyone have any idea on why the css is not being applied to elements that are created after the page is loaded? I have also tried no applying the css until after all of my elements are added, but the results don't change.

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• facebook application using iframe on Facebook Developer Toolkit 3.0

  - by adveb

  hey i am trying to build facebook iframe application using the Facebook Developer Toolkit 3.01 asp.net c#. i am working by the ifrmae sample of the toolkit can be download here. www.facebooktoolkit.codeplex.com/releases/view/39727 this is my facebook application that is the same as the iframe sample. http://apps.facebook.com/alefbet/ this is my code, it has 2 pages, master page and default. this 2 pages are the same as the iframe sample. 1) this is the master page. public partial class IFrameMaster : Facebook.Web.CanvasIFrameMasterPage { public IFrameMaster() { RequireLogin = true; } } 2) this is the default.aspx public partial class Default : System.Web.UI.Page { private const string SCRIPT_BLOCK_NAME = "dynamicScript"; protected void Page_Load(object sender, EventArgs e) { if (IsPostBack) { if (Master.Api.Users.HasAppPermission(Enums.ExtendedPermissions.email)) { SendThankYouEmail(); } Response.Redirect("ThankYou.aspx"); } else { if (Master.Api.Users.HasAppPermission(Enums.ExtendedPermissions.email)) { emailPermissionPanel.Visible = false; } CreateScript(); } } private void SendThankYouEmail() { var subject = "Thank you for telling us your favorite color"; var body = "Thank you for telling us what your favorite color is. We hope you have enjoyed using this application. Encourage your friends to tell us their favorite color as well!"; this.Master.Api.Notifications.SendEmail(this.Master.Api.Session.UserId.ToString(), subject, body, string.Empty); } private void CreateScript() { var saveColorScript = @" function saveColor(color) { document.getElementById('" + colorInput.ClientID + @"').value = color; } function submitForm() { document.getElementById('" + form.ClientID + @"').submit(); } "; if (!ClientScript.IsClientScriptBlockRegistered(SCRIPT_BLOCK_NAME)) { ClientScript.RegisterClientScriptBlock(this.GetType(), SCRIPT_BLOCK_NAME, saveColorScript); } } } my directory structure is 1)the master page is in the root. 2)the default.aspx is in the root/alfbet directory. 3)i have also have the xd_receiver.htm inside root/channel directory. that inside the master page their is the folowing line: <script type="text/javascript"> FB_RequireFeatures(["XFBML"], function() { FB.Facebook.init("c81f17ee4d4ffc5113c55f8b99fdcab5", "channel/xd_receiver.htm"); }); </script> the problem is that the applicatin dosent work apps.facebook.com/alefbet/default.aspx why it dosent work ? please help me and others who also obstacle in this issue. i tryied lots of things, one of them was to display the user id. for that i put label in the default.aspx and wrote lblTest.Text = Master.Api.Users.GetInfo().uid.ToString(); and it dosent event get to this line. i know it because it keeps display in the label.text the word "label" thank you very much.

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• GLFW 3 initialized, yet not?

  - by mSkull

  I'm struggling with creating a window with the GLFW 3 function, glfwCreateWindow. I have set an error callback function, that pretty much just prints out the error number and description, and according to that the GLFW library have not been initialized, even though the glfwInit function just returned success? Here's an outtake from my code // Error callback function prints out any errors from GFLW to the console static void error_callback( int error, const char *description ) { cout << error << '\t' << description << endl; } bool Base::Init() { // Set error callback /*! * According to the documentation this can be use before glfwInit, * and removing won't change anything anyway */ glfwSetErrorCallback( error_callback ); // Initialize GLFW /*! * This return succesfull, but... */ if( !glfwInit() ) { cout << "INITIALIZER: Failed to initialize GLFW!" << endl; return false; } else { cout << "INITIALIZER: GLFW Initialized successfully!" << endl; } // Create window /*! * When this is called, or any other glfw functions, I get a * "65537 The GLFW library is not initialized" in the console, through * the error_callback function */ window = glfwCreateWindow( 800, 600, "GLFW Window", NULL, NULL ); if( !window ) { cout << "INITIALIZER: Failed to create window!" << endl; glfwTerminate(); return false; } // Set window to current context glfwMakeContextCurrent( window ); ... return true; } And here's what's printed out in the console INITIALIZER: GLFW Initialized succesfully! 65537 The GLFW library is not initialized INITIALIZER: Failed to create window! I think I'm getting the error because of the setup isn't entirely correct, but I've done the best I can with what I could find around the place I downloaded the windows 32 from glfw.org and stuck the 2 includes files from it into minGW/include/GLFW, the 2 .a files (from the lib-mingw folder) into minGW/lib and the dll, also from the lib-mingw folder, into Windows/System32 In code::blocks I have, from build options - linker settings, linked the 2 .a files from the download. I believe I need to link more things, but I can figure out what, or where I should get those things from.

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• qT quncompress gzip data

  - by talei

  Hello, I stumble upon a problem, and can't find a solution. So what I want to do is uncompress data in qt, using qUncompress(QByteArray), send from www in gzip format. I used wireshark to determine that this is valid gzip stream, also tested with zip/rar and both can uncompress it. Code so far, is like this: static const char dat[40] = { 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xaa, 0x2e, 0x2e, 0x49, 0x2c, 0x29, 0x2d, 0xb6, 0x4a, 0x4b, 0xcc, 0x29, 0x4e, 0xad, 0x05, 0x00, 0x00, 0x00, 0xff, 0xff, 0x03, 0x00, 0x2a, 0x63, 0x18, 0xc5, 0x0e, 0x00, 0x00, 0x00 }; //this data contains string: {status:false}, in gzip format QByteArray data; data.append( dat, sizeof(dat) ); unsigned int size = 14; //expected uncompresed size, reconstruct it BigEndianes //prepand expected uncompressed size, last 4 byte in dat 0x0e = 14 QByteArray dataPlusSize; dataPlusSize.append( (unsigned int)((size >> 24) & 0xFF)); dataPlusSize.append( (unsigned int)((size >> 16) & 0xFF)); dataPlusSize.append( (unsigned int)((size >> 8) & 0xFF)); dataPlusSize.append( (unsigned int)((size >> 0) & 0xFF)); QByteArray uncomp = qUncompress( dataPlusSize ); qDebug() << uncomp; And uncompression fails with: qUncompress: Z_DATA_ERROR: Input data is corrupted. AFAIK gzip consist of 10 byte header, DEFLATE peyload, 12 byte trailer ( 8 byte CRC32 + 4 byte ISIZE - uncompresed data size ). Striping header and trailer should leave me with DEFLATE data stream, qUncompress yields same error. I checked with data string compressed in PHP, like this: $stringData = gzcompress( "{status:false}", 1); and qUncompress uncompress that data.(I didn't see and gzip header though i.e. ID1 = 0x1f, ID2 = 0x8b ) I checked above code with debug, and error occurs at: if ( #endif ((BITS(8) << 8) + (hold >> 8)) % 31) { //here is error, WHY? long unsigned int hold = 35615 strm->msg = (char *)"incorrect header check"; state->mode = BAD; break; } inflate.c line 610. I know that qUncompress is simply a wrapper to zlib, so I suppose it should handle gzip without any problem. Any comments are more then welcome. Best regards

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• Very simple application fails with "multiple target patterns" from Eclipse

  - by Paul Lammertsma

  Since I'm more comfortable using Eclipse, I thought I'd try converting my project from Visual Studio. Yesterday I tried a very simple little test. No matter what I try, make fails with "multiple target patterns". (This is similar to this unanswered question.) I have three files: Application.cpp: using namespace std; #include "Window.h" int main() { Window *win = new Window(); delete &win; return 0; } Window.h: #ifndef WINDOW_H_ #define WINDOW_H_ class Window { public: Window(); ~Window(); }; #endif Window.cpp: #include <cv.h> #include <highgui.h> #include "Window.h" const char* WINDOW_NAME = "MyApp"; Window::Window() { cvNamedWindow(WINDOW_NAME, CV_WINDOW_AUTOSIZE); cvResizeWindow(WINDOW_NAME, 200, 200); cvMoveWindow(WINDOW_NAME, 0, 0); int key = 0; while (true) { key = cvWaitKey(0); if (key==27 || cvGetWindowHandle(WINDOW_NAME)==0) { break; } } } Window::~Window() { cvDestroyWindow(WINDOW_NAME); } I have added the following paths to the compiler include path (-I): "$(OPENCV)/cv/include" "$(OPENCV)/cxcore/include" "$(OPENCV)/otherlibs/highgui" I have added the following libraries to the linker (-l): cv cxcore highgui And the following library search path (-L): "$(OPENCV)/lib/" Eclipse, the compiler and the linker all succeed in including the headers and libraries. I am using the GNU C/C++ compiler & linker from Cygwin. When compiling, I get the following make error: src/Window.d:1: *** multiple target patterns. Stop. Window.d contains: src/Window.d src/Window.o: ../src/Window.cpp \ C:/Program\ Files/OpenCV/cv/include/cv.h \ C:/Program\ Files/OpenCV/cxcore/include/cxcore.h \ C:/Program\ Files/OpenCV/cxcore/include/cxtypes.h \ C:/Program\ Files/OpenCV/cxcore/include/cxerror.h \ C:/Program\ Files/OpenCV/cxcore/include/cvver.h \ C:/Program\ Files/OpenCV/cxcore/include/cxcore.hpp \ C:/Program\ Files/OpenCV/cv/include/cvtypes.h \ C:/Program\ Files/OpenCV/cv/include/cv.hpp \ C:/Program\ Files/OpenCV/cv/include/cvcompat.h \ C:/Program\ Files/OpenCV/otherlibs/highgui/highgui.h \ C:/Program\ Files/OpenCV/cxcore/include/cxcore.h ../src/Constants.h \ ../src/Window.h C:/Program\ Files/OpenCV/cv/include/cv.h: C:/Program\ Files/OpenCV/cxcore/include/cxcore.h: C:/Program\ Files/OpenCV/cxcore/include/cxtypes.h: C:/Program\ Files/OpenCV/cxcore/include/cxerror.h: C:/Program\ Files/OpenCV/cxcore/include/cvver.h: C:/Program\ Files/OpenCV/cxcore/include/cxcore.hpp: C:/Program\ Files/OpenCV/cv/include/cvtypes.h: C:/Program\ Files/OpenCV/cv/include/cv.hpp: C:/Program\ Files/OpenCV/cv/include/cvcompat.h: C:/Program\ Files/OpenCV/otherlibs/highgui/highgui.h: C:/Program\ Files/OpenCV/cxcore/include/cxcore.h: ../src/Constants.h: ../src/Window.h: I tried removing all OpenCV headers from Window.d (from line 2 onwards), but the error remains. Also, I've updated Eclipse and OpenCV, all to no avail. Do you have any ideas worth trying? I'm willing to try anything!

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• Asp.net MVC2 Custom jquery validation: client -side

  - by Lullaby

  Hi. I want to create a validation rule for 2 date-pickers (startDate less then endDate). I create a validation attribute: [AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = true)] public sealed class DateCompareAttribute : ValidationAttribute { private const string _defaultErrorMessage = "'{0}' is less then '{1}'."; public DateCompareAttribute(string startDateProperty, string endDateProperty) : base(_defaultErrorMessage) { StartDateProperty = startDateProperty; EndDateProperty = endDateProperty; } public string StartDateProperty { get; private set; } public string EndDateProperty { get; private set; } public override string FormatErrorMessage(string name) { return String.Format(CultureInfo.CurrentUICulture, ErrorMessageString, StartDateProperty, EndDateProperty); } public override bool IsValid(object value) { PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(value); object startValue = properties.Find(StartDateProperty, true).GetValue(value); object endValue = properties.Find(EndDateProperty, true).GetValue(value); if (startValue.GetType() == typeof(DateTime?) && endValue.GetType() == typeof(DateTime?)) { var start = ((DateTime?)startValue); var end = ((DateTime?)endValue); return (start.Value < end.Value); } return false; } } and added ti to my Dto: [DateCompare("StartDate", "EndDate")] public class QualificationInput{...} I created a validator: public class DateCompareValidator : DataAnnotationsModelValidator { string startField; private string endField; string _message; public DateCompareValidator(ModelMetadata metadata, ControllerContext context , DateCompareAttribute attribute) : base(metadata, context, attribute) { startField = attribute.StartDateProperty; endField = attribute.EndDateProperty; _message = attribute.ErrorMessage; } public override IEnumerable<ModelClientValidationRule> GetClientValidationRules() { var rule = new ModelClientValidationRule { ErrorMessage = _message, ValidationType = "dateCompare" }; rule.ValidationParameters.Add("startField", startField); rule.ValidationParameters.Add("endField", endField); return new[] { rule }; } } And registered it in Global.asax.cs in Application_Start(): DataAnnotationsModelValidatorProvider .RegisterAdapter(typeof(DateCompareAttribute), typeof(DateCompareValidator)); In MicrosoftMvcJQueryValidation.js I have made this changes: switch (thisRule.ValidationType) { ..... case "dateCompare": __MVC_ApplyValidator_DateCompare(rulesObj, thisRule.ValidationParameters["startField"], thisRule.ValidationParameters["endField"]); break; ..... } .... function __MVC_ApplyValidator_DateCompare(object, startField, endField) { object["startField"] = startField; object["endField"] = endField; } jQuery.validator.addMethod("dateCompare", function(value, element, params) { if ($('#' + params["startField"]).val() < $('#' + params["endField"]).val()) { return true; } return false; }, jQuery.format("Error")); But it doesn't work :( no client side validation on this type of rule (the others type like required works fine) What I'm doing wrong?

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• Resizing QT's QTextEdit to Match Text Height: maximumViewportSize()

  - by Aaron

  I am trying to use a QTextEdit widget inside of a form containing several QT widgets. The form itself sits inside a QScrollArea that is the central widget for a window. My intent is that any necessary scrolling will take place in the main QScrollArea (rather than inside any widgets), and any widgets inside will automatically resize their height to hold their contents. I have tried to implement the automatic resizing of height with a QTextEdit, but have run into an odd issue. I created a sub-class of QTextEdit and reimplemented sizeHint() like this: QSize OperationEditor::sizeHint() const { QSize sizehint = QTextBrowser::sizeHint(); sizehint.setHeight(this->fitted_height); return sizehint; } this-fitted_height is kept up-to-date via this slot that is wired to the QTextEdit's "contentsChanged()" signal: void OperationEditor::fitHeightToDocument() { this->document()->setTextWidth(this->viewport()->width()); QSize document_size(this->document()->size().toSize()); this->fitted_height = document_size.height(); this->updateGeometry(); } The size policy of the QTextEdit sub-class is: this->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred); I took this approach after reading this post. Here is my problem: As the QTextEdit gradually resizes to fill the window, it stops getting larger and starts scrolling within the QTextEdit, no matter what height is returned from sizeHint(). If I initially have sizeHint() return some large constant number, then the QTextEdit is very big and is contained nicely within the outer QScrollArea, as one would expect. However, if sizeHint gradually adjusts the size of the QTextEdit rather than just making it really big to start, then it tops out when it fills the current window and starts scrolling instead of growing. I have traced this problem to be that, no matter what my sizeHint() returns, it will never resize the QTextEdit larger than the value returned from maximumViewportSize(), which is inherited from QAbstractScrollArea. Note that this is not the same number as viewport()-maximumSize(). I am unable to figure out how to set that value. Looking at QT's source code, maximumViewportSize() is returning "the size of the viewport as if the scroll bars had no valid scrolling range." This value is basically computed as the current size of the widget minus (2 * frameWidth + margins) plus any scrollbar widths/heights. This does not make a lot of sense to me, and it's not clear to me why that number would be used anywhere in a way that supercede's the sub-class's sizeHint() implementation. Also, it does seem odd that the single "frameWidth" integer is used in computing both the width and the height. Can anyone please shed some light on this? I suspect that my poor understanding of QT's layout engine is to blame here.

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• System.Data.SQLite parameter issue

  - by CasperT

  I have the following code: try { //Create connection SQLiteConnection conn = DBConnection.OpenDB(); //Verify user input, normally you give dbType a size, but Text is an exception var uNavnParam = new SQLiteParameter("@uNavnParam", SqlDbType.Text) { Value = uNavn }; var bNavnParam = new SQLiteParameter("@bNavnParam", SqlDbType.Text) { Value = bNavn }; var passwdParam = new SQLiteParameter("@passwdParam", SqlDbType.Text) {Value = passwd}; var pc_idParam = new SQLiteParameter("@pc_idParam", SqlDbType.TinyInt) { Value = pc_id }; var noterParam = new SQLiteParameter("@noterParam", SqlDbType.Text) { Value = noter }; var licens_idParam = new SQLiteParameter("@licens_idParam", SqlDbType.TinyInt) { Value = licens_id }; var insertSQL = new SQLiteCommand("INSERT INTO Brugere (navn, brugernavn, password, pc_id, noter, licens_id)" + "VALUES ('@uNameParam', '@bNavnParam', '@passwdParam', '@pc_idParam', '@noterParam', '@licens_idParam')", conn); insertSQL.Parameters.Add(uNavnParam); //replace paramenter with verified userinput insertSQL.Parameters.Add(bNavnParam); insertSQL.Parameters.Add(passwdParam); insertSQL.Parameters.Add(pc_idParam); insertSQL.Parameters.Add(noterParam); insertSQL.Parameters.Add(licens_idParam); insertSQL.ExecuteNonQuery(); //Execute query //Close connection DBConnection.CloseDB(conn); //Let the user know that it was changed succesfully this.Text = "Succes! Changed!"; } catch(SQLiteException e) { //Catch error MessageBox.Show(e.ToString(), "ALARM"); } It executes perfectly, but when I view my "brugere" table, it has inserted the values: '@uNameParam', '@bNavnParam', '@passwdParam', '@pc_idParam', '@noterParam', '@licens_idParam' literally. Instead of replacing them. I have tried making a breakpoint and checked the parameters, they do have the correct assigned values. So that is not the issue either. I have been tinkering with this a lot now, with no luck, can anyone help? Oh and for reference, here is the OpenDB method from the DBConnection class: public static SQLiteConnection OpenDB() { try { //Gets connectionstring from app.config const string myConnectString = "data source=data;"; var conn = new SQLiteConnection(myConnectString); conn.Open(); return conn; } catch (SQLiteException e) { MessageBox.Show(e.ToString(), "ALARM"); return null; } }

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• Sharepoint 2007 - cant find my modifications to web.config in SpWebApplication.WebConfigModification

  - by user303672

  Hi, I cant seem to find the modifications I made to web.config in my FeatureRecievers Activated event. I try to get the modifications from the SpWebApplication.WebConfigModifications collection in the deactivate event, but this is always empty.... And the strangest thing is that my changes are still reverted after deactivating the feature... My question is, should I not be able to view all changes made to the web.config files when accessing the SpWebApplication.WebConfigModifications collection in the Deactivating event? How should I go about to remove my changes explicitly? public class FeatureReciever : SPFeatureReceiver { private const string FEATURE_NAME = "HelloWorld"; private class Modification { public string Name; public string XPath; public string Value; public SPWebConfigModification.SPWebConfigModificationType ModificationType; public bool createOnly; public Modification(string name, string xPath, string value, SPWebConfigModification.SPWebConfigModificationType modificationType, bool createOnly) { Name = name; XPath = xPath; Value = value; ModificationType = modificationType; this.createOnly = createOnly; } } private Modification[] modifications = { new Modification("connectionStrings", "configuration", "<connectionStrings/>", SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode, true), new Modification("add[@name='ConnectionString'][@connectionString='Data Source=serverName;Initial Catalog=DBName;User Id=UserId;Password=Pass']", "configuration/connectionStrings", "<add name='ConnectionString' connectionString='Data Source=serverName;Initial Catalog=DBName;User Id=UserId;Password=Pass'/>", SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode, false) }; public override void FeatureActivated(SPFeatureReceiverProperties properties) { SPSite siteCollection = (properties.Feature.Parent as SPWeb).Site as SPSite; SPWebApplication webApplication = siteCollection.WebApplication; siteCollection.RootWeb.Title = "Set from activating code at " + DateTime.Now.ToString(); foreach (Modification entry in modifications) { SPWebConfigModification webConfigModification = CreateModification(entry); webApplication.WebConfigModifications.Add(webConfigModification); } webApplication.Farm.Services.GetValue<SPWebService>().ApplyWebConfigModifications(); webApplication.WebService.Update(); } public override void FeatureDeactivating(SPFeatureReceiverProperties properties) { SPSite siteCollection = (properties.Feature.Parent as SPWeb).Site as SPSite; SPWebApplication webApplication = siteCollection.WebApplication; siteCollection.RootWeb.Title = "Set from deactivating code at " + DateTime.Now.ToString(); IList<SPWebConfigModification> modifications = webApplication.WebConfigModifications; foreach (SPWebConfigModification modification in modifications) { if (modification.Owner == FEATURE_NAME) { webApplication.WebConfigModifications.Remove(modification); } } webApplication.Farm.Services.GetValue<SPWebService>().ApplyWebConfigModifications(); webApplication.WebService.Update(); } public override void FeatureInstalled(SPFeatureReceiverProperties properties) { } public override void FeatureUninstalling(SPFeatureReceiverProperties properties) { } private SPWebConfigModification CreateModification(Modification entry) { SPWebConfigModification spWebConfigModification = new SPWebConfigModification() { Name = entry.Name, Path = entry.XPath, Owner = FEATURE_NAME, Sequence = 0, Type = entry.ModificationType, Value = entry.Value }; return spWebConfigModification; } } Thanks for your time. /Hans

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• How do i rotate a CALayer around a diagonal line?

  - by Mattias Wadman

  Hi. I'm trying to implement a flip animation to be used in board game like iPhone-application. The animation is supposed to look like a game piece that rotates and changes to the color of its back (kind of like an Reversi piece). I've managed to create an animation that flips the piece around its orthogonal axis, but when I try to flip it around a diagonal axis by changing the rotation around the z-axis the actual image also gets rotated (not surprisingly). Instead I would like to rotate the image "as is" around a diagonal axis. I have tried to change layer.sublayerTransform but with no success. Here is my current implementation. It works by doing a trick to resolve the issue of getting a mirrored image at the end of the animation. The solution is to not actually rotate the layer 180 degrees, instead it rotates it 90 degrees, changes image and then rotates it back. + (void)flipLayer:(CALayer *)layer toImage:(CGImageRef)image withAngle:(double)angle { const float duration = 0.5f; CAKeyframeAnimation *diag = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"]; diag.duration = duration; diag.values = [NSArray arrayWithObjects: [NSNumber numberWithDouble:angle], [NSNumber numberWithDouble:0.0f], nil]; diag.keyTimes = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], [NSNumber numberWithDouble:1.0f], nil]; diag.calculationMode = kCAAnimationDiscrete; CAKeyframeAnimation *flip = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.y"]; flip.duration = duration; flip.values = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], [NSNumber numberWithDouble:M_PI / 2], [NSNumber numberWithDouble:0.0f], nil]; flip.keyTimes = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], [NSNumber numberWithDouble:0.5f], [NSNumber numberWithDouble:1.0f], nil]; flip.calculationMode = kCAAnimationLinear; CAKeyframeAnimation *replace = [CAKeyframeAnimation animationWithKeyPath:@"contents"]; replace.duration = duration / 2; replace.beginTime = duration / 2; replace.values = [NSArray arrayWithObjects:(id)image, nil]; replace.keyTimes = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], nil]; replace.calculationMode = kCAAnimationDiscrete; CAAnimationGroup *group = [CAAnimationGroup animation]; group.removedOnCompletion = NO; group.duration = duration; group.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; group.animations = [NSArray arrayWithObjects:diag, flip, replace, nil]; group.fillMode = kCAFillModeForwards; [layer addAnimation:group forKey:nil]; }

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• Using 32 bit g++ to build 64bit binaries on AIX

  - by Thumbeti

  I am trying to build a 64 bit binary from C++ code using 32bit g++ compiler. I am getting the following errors while building: ============================================================================= => /usr/local/bin/g++ -shared -maix64 -fPIC -Wl,-bM:SRE -Wl,-bnoentry -Wl,-bE:gcc_shr_lib.so.exp -o gcc_shr_lib.so gcc_shr_lib.o -L/usr/local/lib ld: 0711-319 WARNING: Exported symbol not defined: gcc_whereAmI ld: 0711-317 ERROR: Undefined symbol: typeinfo for std::bad_alloc ld: 0711-317 ERROR: Undefined symbol: __gxx_personality_v0 ld: 0711-317 ERROR: Undefined symbol: vtable for std::exception ld: 0711-317 ERROR: Undefined symbol: vtable for std::bad_alloc ld: 0711-317 ERROR: Undefined symbol: .std::ios_base::Init::Init() ld: 0711-317 ERROR: Undefined symbol: .std::ios_base::Init::~Init() ld: 0711-317 ERROR: Undefined symbol: .operator new(unsigned long) ld: 0711-317 ERROR: Undefined symbol: .operator delete(void*) ld: 0711-317 ERROR: Undefined symbol: ._Unwind_Resume ld: 0711-317 ERROR: Undefined symbol: .__cxa_get_exception_ptr ld: 0711-317 ERROR: Undefined symbol: .__cxa_begin_catch ld: 0711-317 ERROR: Undefined symbol: std::cout ld: 0711-317 ERROR: Undefined symbol: .std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*) ld: 0711-317 ERROR: Undefined symbol: std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&) ld: 0711-317 ERROR: Undefined symbol: .std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&)) ld: 0711-317 ERROR: Undefined symbol: .std::bad_alloc::~bad_alloc() ld: 0711-317 ERROR: Undefined symbol: .__cxa_end_catch ld: 0711-317 ERROR: Undefined symbol: .__register_frame_info_table ld: 0711-317 ERROR: Undefined symbol: .__deregister_frame_info ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. collect2: ld returned 8 exit status ============================================================================= It seems I need 64bit libstdc++ available on my build system. Could you please throw some light to solve this. Q1) Is it ok to build 64 bit binaries using 32 bit g++ compiler on AIX 5.2 Q2) Where should I get 64 bit libstdc++? Will this 64 bit libstdc++ work with 32bit g++ compiler?

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• C# file Decryption - Bad Data

  - by Jon

  Hi all, I am in the process of rewriting an old application. The old app stored data in a scoreboard file that was encrypted with the following code: private const String SSecretKey = @"?B?n?Mj?"; public DataTable GetScoreboardFromFile() { FileInfo f = new FileInfo(scoreBoardLocation); if (!f.Exists) { return setupNewScoreBoard(); } DESCryptoServiceProvider DES = new DESCryptoServiceProvider(); //A 64 bit key and IV is required for this provider. //Set secret key For DES algorithm. DES.Key = ASCIIEncoding.ASCII.GetBytes(SSecretKey); //Set initialization vector. DES.IV = ASCIIEncoding.ASCII.GetBytes(SSecretKey); //Create a file stream to read the encrypted file back. FileStream fsread = new FileStream(scoreBoardLocation, FileMode.Open, FileAccess.Read); //Create a DES decryptor from the DES instance. ICryptoTransform desdecrypt = DES.CreateDecryptor(); //Create crypto stream set to read and do a //DES decryption transform on incoming bytes. CryptoStream cryptostreamDecr = new CryptoStream(fsread, desdecrypt, CryptoStreamMode.Read); DataTable dTable = new DataTable("scoreboard"); dTable.ReadXml(new StreamReader(cryptostreamDecr)); cryptostreamDecr.Close(); fsread.Close(); return dTable; } This works fine. I have copied the code into my new app so that I can create a legacy loader and convert the data into the new format. The problem is I get a "Bad Data" error: System.Security.Cryptography.CryptographicException was unhandled Message="Bad Data.\r\n" Source="mscorlib" The error fires at this line: dTable.ReadXml(new StreamReader(cryptostreamDecr)); The encrypted file was created today on the same machine with the old code. I guess that maybe the encryption / decryption process uses the application name / file or something and therefore means I can not open it. Does anyone have an idea as to: A) Be able explain why this isn't working? B) Offer a solution that would allow me to be able to open files that were created with the legacy application and be able to convert them please? Thank you

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• Can't build full html table in QTextEdit with std::for_each...

  - by mosg

  Hi. Here is my code function: void ReportHistory::update(void) { ui.output->clear(); ui.output->setCurrentFont(QFont("Arial", 8, QFont::Normal)); QString title = "My Title"; QStringList headers = QString("Header1,Header2,Header3,Header4,Header5,Header6").split(","); QString html = QString( "<html>" \ "<head>" \ "<meta Content=\"Text/html; charset=Windows-1251\">" \ "<title>%1</title>" \ "</head>" \ "<body bgcolor=#ffffff link=#5000A0>" \ "<p>%1</p>" \ "<table border=1 cellspacing=0 cellpadding=2>" \ "<tr bgcolor=#f0f0f0>" ).arg(title); foreach (QString header, headers) { html.append(QString("<th>%1</th>").arg(header)); } html.append("</tr>"); struct Fill { QString html_; Analytics::NavHistory::History::value_type prev_; Fill(QString html) : html_(html) {} void operator ()(const Analytics::NavHistory::History::value_type& entry) { QStringList line = (QString( "%1|%2|%3|%4|%5|%6" ).arg(value1, 15) .arg(value2 ? ' ' : 'C', 8) .arg(value3, 15) .arg(value4, 15, 'f', 4) .arg(value5, 15) .arg(value6, 15, 'f', 4)).split("|"); html_.append("<tr>"); foreach (QString item, line) { html_.append("<td bkcolor=0>%1</td>").arg(item); } html_.append("</tr>"); prev_ = entry; } }; std::for_each(history_->data().begin(), history_->data().end(), Fill(html)); html.append( "</table>" \ "</body>" \ "</html>"); ui.output->setHtml(html); } Where: ui.output is a pointer to QTextEdit. Question: the ui.output just show me the headers, and not the full table, what is wrong? Thanks.

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• PCRE multi line matche problem

  - by Simone Margaritelli

  Hi guys, i have this C++ program (actually it's just a snippet) : #include <iostream> #include <pcre.h> #include <string> using namespace std; int main(){ string pattern = "<a\\s+href\\s*=\\s*\"([^\"]+)\"", html = "<html>\n" "<body>\n" "<a href=\"example_link_1\"/>\n" "<a href=\"example_link_2\"/>\n" "<a href=\"example_link_3\"/>\n" "</body>\n" "</html>"; int i, ccount, rc, *offsets, eoffset; const char *error; pcre *compiled; compiled = pcre_compile( pattern.c_str(), PCRE_CASELESS | PCRE_MULTILINE, &error, &eoffset, 0 ); if( !compiled ){ cerr << "Error compiling the regexp!!" << endl; return 0; } rc = pcre_fullinfo( compiled, 0, PCRE_INFO_CAPTURECOUNT, &ccount ); offsets = new int[ 3 * (ccount + 1) ]; rc = pcre_exec( compiled, 0, html.c_str(), html.length(), 0, 0, offsets, 3 * (ccount + 1) ); if( rc >= 0 ){ for( i = 1; i < rc; ++i ){ cout << "Match : " << html.substr( offsets[2*i], offsets[2*i+1] - offsets[2*i] ) << endl; } } else{ cout << "Sorry, no matches!" << endl; } delete [] offsets; return 0; } As you can see, i'm trying to match html links inside a buffer with the given regular expression (the \\s is \s escaped for C/C++ strings). But, even if in the buffer there are 3 links and the regexp is compiled with the PCRE_CASELESS and PCRE_MULTILINE flags, i match only one element : Match : example_link_1 Note: I start the loop fro index 1 because the pcre library returns the string that matched (not the match itself) as the first element, and the matches follows. What's wrong with this code? The regexp itself i think it's correct (tried in PHP for instance).

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