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  • Opening up TCP Sockets in j2ee Webapplication

    - by Gvenez
    Hello, We have to communicate with a C++ component from a J2ee web application and my proposal involved using JMS server to communicate with the C++ component which is located on other machine. However the developer of the C++ component wants me to open up TCP/IP sockets from the webapplication and communicate over XML. My view is that socket programming in web application is error prone and will not scale well since there is a limited amount of sockets that can be opened up. Please let me have your architecture/design preference on using JMS vs TCP/IP sockets. Thank you

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  • Lockless queue implementation ends up having a loop under stress

    - by Fozi
    I have lockless queues written in C in form of a linked list that contains requests from several threads posted to and handled in a single thread. After a few hours of stress I end up having the last request's next pointer pointing to itself, which creates an endless loop and locks up the handling thread. The application runs (and fails) on both Linux and Windows. I'm debugging on Windows, where my COMPARE_EXCHANGE_PTR maps to InterlockedCompareExchangePointer. This is the code that pushes a request to the head of the list, and is called from several threads: void push_request(struct request * volatile * root, struct request * request) { assert(request); do { request->next = *root; } while(COMPARE_EXCHANGE_PTR(root, request, request->next) != request->next); } This is the code that gets a request from the end of the list, and is only called by a single thread that is handling them: struct request * pop_request(struct request * volatile * root) { struct request * volatile * p; struct request * request; do { p = root; while(*p && (*p)->next) p = &(*p)->next; // <- loops here request = *p; } while(COMPARE_EXCHANGE_PTR(p, NULL, request) != request); assert(request->next == NULL); return request; } Note that I'm not using a tail pointer because I wanted to avoid the complication of having to deal with the tail pointer in push_request. However I suspect that the problem might be in the way I find the end of the list. There are several places that push a request into the queue, but they all look generaly like this: // device->requests is defined as struct request * volatile requests; struct request * request = malloc(sizeof(struct request)); if(request) { // fill out request fields push_request(&device->requests, request); sem_post(device->request_sem); } The code that handles the request is doing more than that, but in essence does this in a loop: if(sem_wait_timeout(device->request_sem, timeout) == sem_success) { struct request * request = pop_request(&device->requests); // handle request free(request); } I also just added a function that is checking the list for duplicates before and after each operation, but I'm afraid that this check will change the timing so that I will never encounter the point where it fails. (I'm waiting for it to break as I'm writing this.) When I break the hanging program the handler thread loops in pop_request at the marked position. I have a valid list of one or more requests and the last one's next pointer points to itself. The request queues are usually short, I've never seen more then 10, and only 1 and 3 the two times I could take a look at this failure in the debugger. I thought this through as much as I could and I came to the conclusion that I should never be able to end up with a loop in my list unless I push the same request twice. I'm quite sure that this never happens. I'm also fairly sure (although not completely) that it's not the ABA problem. I know that I might pop more than one request at the same time, but I believe this is irrelevant here, and I've never seen it happening. (I'll fix this as well) I thought long and hard about how I can break my function, but I don't see a way to end up with a loop. So the question is: Can someone see a way how this can break? Can someone prove that this can not? Eventually I will solve this (maybe by using a tail pointer or some other solution - locking would be a problem because the threads that post should not be locked, I do have a RW lock at hand though) but I would like to make sure that changing the list actually solves my problem (as opposed to makes it just less likely because of different timing).

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  • http request to cgi python script successful, but the script doesn't seem to run

    - by chipChocolate.py
    I have configured cgi scripts for my apache2 web server. Here is what I want to do: Client uploads the image to the server. (this already works) On success, I want to execute the python script to resize the image. I tried the following and the success function does execute but my python script does not seem to execute: Javascript code that sends the request: var input = document.getElementById('imageLoader'); imageName = input.value; var file = input.files[0]; if(file != undefined){ formData= new FormData(); console.log(formData.length); if(!!file.type.match(/image.*/)){ formData.append("image", file); $.ajax({ url: "upload.php", type: "POST", processData: false, contentType: false, success: function() { var input = document.getElementById('imageLoader'); imageName = input.value; var file = input.files[0]; formData = new FormData(); formData.append("filename", file); $.ajax({ url: "http://localhost/Main/cgi-bin/resize.py", type: "POST", data: formData, processData: false, contentType: false, success: function(data) { console.log(data); } }); // code continues... resize.py: #!/usr/bin/python import cgi import cgitb import Image cgitb.enable() data = cgi.FieldStorage() filename = data.getvalue("filename") im = Image.open("../JS/upload/" + filename) (width, height) = im.size maxWidth = 600 maxHeight = 400 if width > maxWidth: d = float(width) / maxWidth height = int(height / d) width = maxWidth if height > maxHeight: d = float(height) / maxHeight width = int(width / d) height = maxHeight size = (width, height) im = im.resize(size, Image.ANTIALIAS) im.save("../JS/upload/" + filename, quality=100) This is the apache2.conf: <Directory /var/www/html/Main/cgi-bin> AllowOverride None Options +ExecCGI SetHandler cgi-script AddHandler cgi-script .py .cgi Order allow,deny Allow from all </Directory> cgi-bin and python script file permissions: drwxrwxr-x 2 mou mou 4096 Aug 24 03:28 cgi-bin -rwxrwxrwx 1 mou mou 1673 Aug 24 03:28 resize.py Edit: Executing this code $.ajax({ url: "http://localhost/Main/cgi-bin/resize.py", type: "POST", data: formData, // formData = {"filename" : "the filename which was saved in a variable whie the image was uploaded"} processData: false, contentType: false, success: function(data) { alert(data); } }); it alerts the following: <body bgcolor="#f0f0f8"><font color="#f0f0f8" size="-5"> --> <body bgcolor="#f0f0f8"><font color="#f0f0f8" size="-5"> --> --> </font> </font> </font> </script> </object> </blockquote> </pre> </table> </table> </table> </table> </table> </font> </font> </font><body bgcolor="#f0f0f8"> <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading"> <tr bgcolor="#6622aa"> <td valign=bottom>&nbsp;<br> <font color="#ffffff" face="helvetica, arial">&nbsp;<br><big><big><strong>&lt;type 'exceptions.TypeError'&gt;</strong></big></big></font></td ><td align=right valign=bottom ><font color="#ffffff" face="helvetica, arial">Python 2.7.6: /usr/bin/python<br>Sun Aug 24 17:24:15 2014</font></td></tr></table> <p>A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.</p> <table width="100%" cellspacing=0 cellpadding=0 border=0> <tr><td bgcolor="#d8bbff"><big>&nbsp;</big><a href="file:///var/www/html/Main/cgi-bin/resize.py">/var/www/html/Main/cgi-bin/resize.py</a> in <strong><module></strong>()</td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;&nbsp;&nbsp;10</small>&nbsp;<br> </tt></font></td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;&nbsp;&nbsp;11</small>&nbsp;filename&nbsp;=&nbsp;data.getvalue("filename")<br> </tt></font></td></tr> <tr><td bgcolor="#ffccee"><tt>=&gt;<small>&nbsp;&nbsp;&nbsp;12</small>&nbsp;im&nbsp;=&nbsp;Image.open("../JS/upload/"&nbsp;+&nbsp;filename)<br> </tt></td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;&nbsp;&nbsp;13</small>&nbsp;<br> </tt></font></td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;&nbsp;&nbsp;14</small>&nbsp;(width,&nbsp;height)&nbsp;=&nbsp;im.size<br> </tt></font></td></tr> <tr><td><small><font color="#909090">im <em>undefined</em>, <strong>Image</strong>&nbsp;= &lt;module 'Image' from '/usr/lib/python2.7/dist-packages/PILcompat/Image.pyc'&gt;, Image.<strong>open</strong>&nbsp;= &lt;function open&gt;, <strong>filename</strong>&nbsp;= '<font color="#c040c0">\xff\xd8\xff\xe0\x00\x10</font>JFIF<font color="#c040c0">\x00\x01\x01\x00\x00\x01\x00\x01\x00\x00\xff\xdb\x00</font>C<font color="#c040c0">\x00\x06\x04\x05\x06\x05\x04\x06\x06\x05\x06\x07\x07\x06\x08\n\x10\n\n\t\t\n\x14\x0e</font>...<font color="#c040c0">\x94\r\x17\x11</font>b<font color="#c040c0">\xcd\xdc\x1a\xfe\xf1\x05\x1b\x15\xd1</font>R<font color="#c040c0">\xce\xe9</font>*<font color="#c040c0">\xb5\x8e</font>b<font color="#c040c0">\x97\x82\x87</font>R<font color="#c040c0">\xf4\xaa</font>K<font color="#c040c0">\x83</font>6<font color="#c040c0">\xbf\xfb</font>0<font color="#c040c0">\xa0\xb6</font>8<font color="#c040c0">\xa9</font>C<font color="#c040c0">\x86\x8d\x96</font>n+E<font color="#c040c0">\xd3\x7f\x99\xff\xd9</font>'</font></small></td></tr></table> <table width="100%" cellspacing=0 cellpadding=0 border=0> <tr><td bgcolor="#d8bbff"><big>&nbsp;</big><a href="file:///usr/lib/python2.7/dist-packages/PIL/Image.py">/usr/lib/python2.7/dist-packages/PIL/Image.py</a> in <strong>open</strong>(fp='../JS/upload/<font color="#c040c0">\xff\xd8\xff\xe0\x00\x10</font>JFIF<font color="#c040c0">\x00\x01\x01\x00\x00\x01\x00\x01\x00\x00\xff\xdb\x00</font>C<font color="#c040c0">\x00\x06\x04\x05\x06\x05\x04\x06\x06\x05\x06</font>...<font color="#c040c0">\x94\r\x17\x11</font>b<font color="#c040c0">\xcd\xdc\x1a\xfe\xf1\x05\x1b\x15\xd1</font>R<font color="#c040c0">\xce\xe9</font>*<font color="#c040c0">\xb5\x8e</font>b<font color="#c040c0">\x97\x82\x87</font>R<font color="#c040c0">\xf4\xaa</font>K<font color="#c040c0">\x83</font>6<font color="#c040c0">\xbf\xfb</font>0<font color="#c040c0">\xa0\xb6</font>8<font color="#c040c0">\xa9</font>C<font color="#c040c0">\x86\x8d\x96</font>n+E<font color="#c040c0">\xd3\x7f\x99\xff\xd9</font>', mode='r')</td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;1994</small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;isPath(fp):<br> </tt></font></td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;1995</small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;filename&nbsp;=&nbsp;fp<br> </tt></font></td></tr> <tr><td bgcolor="#ffccee"><tt>=&gt;<small>&nbsp;1996</small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fp&nbsp;=&nbsp;builtins.open(fp,&nbsp;"rb")<br> </tt></td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;1997</small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:<br> </tt></font></td></tr> <tr><td><font color="#909090"><tt>&nbsp;&nbsp;<small>&nbsp;1998</small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;filename&nbsp;=&nbsp;""<br> </tt></font></td></tr> <tr><td><small><font color="#909090"><strong>fp</strong>&nbsp;= '../JS/upload/<font color="#c040c0">\xff\xd8\xff\xe0\x00\x10</font>JFIF<font color="#c040c0">\x00\x01\x01\x00\x00\x01\x00\x01\x00\x00\xff\xdb\x00</font>C<font color="#c040c0">\x00\x06\x04\x05\x06\x05\x04\x06\x06\x05\x06</font>...<font color="#c040c0">\x94\r\x17\x11</font>b<font color="#c040c0">\xcd\xdc\x1a\xfe\xf1\x05\x1b\x15\xd1</font>R<font color="#c040c0">\xce\xe9</font>*<font color="#c040c0">\xb5\x8e</font>b<font color="#c040c0">\x97\x82\x87</font>R<font color="#c040c0">\xf4\xaa</font>K<font color="#c040c0">\x83</font>6<font color="#c040c0">\xbf\xfb</font>0<font color="#c040c0">\xa0\xb6</font>8<font color="#c040c0">\xa9</font>C<font color="#c040c0">\x86\x8d\x96</font>n+E<font color="#c040c0">\xd3\x7f\x99\xff\xd9</font>', <em>global</em> <strong>builtins</strong>&nbsp;= &lt;module '__builtin__' (built-in)&gt;, builtins.<strong>open</strong>&nbsp;= &lt;built-in function open&gt;</font></small></td></tr></table><p><strong>&lt;type 'exceptions.TypeError'&gt;</strong>: file() argument 1 must be encoded string without NULL bytes, not str <br><tt><small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</small>&nbsp;</tt>args&nbsp;= ('file() argument 1 must be encoded string without NULL bytes, not str',) <br><tt><small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</small>&nbsp;</tt>message&nbsp;= 'file() argument 1 must be encoded string without NULL bytes, not str' <!-- The above is a description of an error in a Python program, formatted for a Web browser because the 'cgitb' module was enabled. In case you are not reading this in a Web browser, here is the original traceback: Traceback (most recent call last): File "/var/www/html/Main/cgi-bin/resize.py", line 12, in &lt;module&gt; im = Image.open("../JS/upload/" + filename) File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 1996, in open fp = builtins.open(fp, "rb") TypeError: file() argument 1 must be encoded string without NULL bytes, not str --> Does this mean that the formData I am sending over is empty?

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  • IntegrationTests - A potentially dangerous Request.Path value was detected from the client

    - by stacker
    I get this error: A potentially dangerous Request.Path value was detected from the client (?). when this URI: http://www.site.com/%3f. How can I write a integration test for this type of errors. I want to test against all this erros: A potentially dangerous Request.Path value was detected from the client A potentially dangerous Request.Cookies value was detected from the client A potentially dangerous Request.Form value was detected from the client A potentially dangerous Request.QueryString value was detected from the client

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  • Using returned XML from an authorised HTTP request in vb.NET

    - by Nathan
    Hi, How can I use the returned XML from the reader in a xmltextreader? ' Create the web request request = DirectCast(WebRequest.Create("https://mobilevikings.com/api/1.0/rest/mobilevikings/sim_balance.xml"), HttpWebRequest) ' Add authentication to request request.Credentials = New NetworkCredential("username", "password") ' Get response response = DirectCast(request.GetResponse(), HttpWebResponse) ' Get the response stream into a reader reader = New StreamReader(response.GetResponseStream()) Thanks in advance, Nathan.

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  • IIS 7 returning 400 Bad Request on POST

    - by xenolf
    Greetings, i am trying to POST data in a MVC 3 application to a server running IIS 7 using jquery ajax. When i post normally to the server, everything works ok, just when i post with ajax the server returns a 400 Bad request. I already ran a trace on such a request but all i got from that was the following: ModuleName="ManagedPipelineHandler", Notification="EXECUTE_REQUEST_HANDLER", HttpStatus="400", HttpReason="Bad Request", HttpSubStatus="0", ErrorCode="The operation completed successfully. (0x0)", ConfigExceptionInfo="" Can anyone point me into the right direction to solve this issue? Thanks

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  • How to kill a single request in IIS?

    - by Petter Brodin
    I'm using IISPeek and can see that there's a single request that's hanging on a buggy page. I've fixed the bug so that others who open the page won't experience the problem, but the page is still active after almost an hour. I'd rather not stop the whole application as there are some important processes currently running. Via IISPeek I have the request number (9f0002008001238e) and clientIP. Could any of that be used to stop the ongoing request?

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  • Replies to request coming over a relay goes to relay's internal IP, not to original request's source IP

    - by seaquest
    Dhcpd running on Linux gets a dhcp request over dhcrelay which is running on other remote machine. Oct 6 10:09:46 2012 dhcpd: DHCPDISCOVER from 00:1e:68:06:eb:37 (oguz-U300) via 172.16.17.81 tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 96 bytes 10:35:01.112500 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 328) 192.168.0.81.67 > 192.168.0.1.67: BOOTP/DHCP, Request from 00:1e:68:06:eb:37, length: 300, hops:1, xid:0xe378fc7e, flags: [none] (0x0000) Gateway IP: 172.16.17.81 Client Ethernet Address: 00:1e:68:06:eb:37 [|bootp] It matches to a subnet and send reply. However reply does not go to the requesting dhcrelay external IP(192.168.0.81). Instead, it goes to the internal interface IP of machine running dhcrelay. And I think because of this remote machine running dhcrelay or the dhcrealy itself discarding packet. Oct 6 10:09:46 2012 dhcpd: DHCPOFFER on 172.16.17.11 to 00:1e:68:06:eb:37 (oguz-U300) via 172.16.17.81 10:35:02.050108 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 328) 192.168.0.1.67 > 172.16.17.81.67: BOOTP/DHCP, Reply, length: 300, hops:1, xid:0xe378fc7e, flags: [none] (0x0000) Your IP: 172.16.17.11 Gateway IP: 172.16.17.81 Client Ethernet Address: 00:1e:68:06:eb:37 [|bootp] Is this a normal behaviour? Machine running dhcrelay: eth1(ext) Link encap:Ethernet HWaddr 00:90:0B:21:43:F4 inet addr:192.168.0.81 Bcast:192.168.0.255 Mask:255.255.255.0 eth2(int) Link encap:Ethernet HWaddr 00:90:0B:21:43:F5 inet addr:172.16.17.81 Bcast:172.16.17.255 Mask:255.255.255.0 3582 ? Ss 0:00 /usr/sbin/dhcrelay -i eth2 192.168.0.1 Machine running dhcpd: eth1 Link encap:Ethernet HWaddr 00:90:0B:23:97:D1 inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0 option domain-name "test.com"; option subnet-mask 255.255.255.0; authoritative; ignore client-updates; ddns-update-style ad-hoc; default-lease-time 86400; max-lease-time 86400; subnet 192.168.0.0 netmask 255.255.255.0 { range 192.168.0.135 192.168.0.169; option broadcast-address 192.168.0.255; option domain-name-servers 192.168.0.1; option domain-name "test.com"; option routers 192.168.0.1; } subnet 172.16.17.0 netmask 255.255.255.0 { local-address 192.168.0.1; server-identifier 192.168.0.1; range 172.16.17.10 172.16.17.11; option broadcast-address 172.16.17.255; option routers 172.16.17.81; } (I put local-address and server-identifier. But this does not help ) Regards, -- Oguz YILMAZ UPDATE: The first problem is found. I have configured dhcrelay only on listening internel interface. It seems (of course) is should also listen to external interface for replies. It appears it is not important where the packet destined to. dhrelay will forward it to internal net. HOWEVER, I have deleted route on dhcpd server to reach 172.16.17.x subnet. It again tries to send reply to 172.16.17.81. Because it does not know the route it send it from default gateway to the internet. eth0: IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 328) 192.168.1.2.67 > 172.16.17.81.67: BOOTP/DHCP, Reply, length: 300, hops:1, xid:0x32830125, secs:3, flags: [none] (0x0000) eth0: Your IP: 172.16.17.11 eth0: Gateway IP: 172.16.17.81 eth0: Client Ethernet Address: 00:1e:68:06:eb:37 [|bootp] How can I force dhcpd to force to send replies to requesting IP? Because, it is not much meaningful to add routes to subnet we distribute IP for. Internet - dhcpd - 192.168.0.1 - SOMENET - 192.168.0.81 - dhcrelay - 172.16.17.0/24 192.168.0.1 has no route for 172.16.17.0 and has no interface directly attached to that net.

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  • wget hangs in http request sent awaiting response in some sites

    - by gkr
    Using Ubuntu 12.04. wget hangs in http request sent, awaiting response... in some sites. Browser's are not opening sites that are failed in wget. But in WinXP everything works. This works gkr@gkr-desktop:~/Documents/curl$ wget google.com --2012-06-12 21:29:37-- http://google.com/ Resolving google.com (google.com)... 74.125.236.174, 74.125.236.160, 74.125.236.161, ... Connecting to google.com (google.com)|74.125.236.174|:80... connected. HTTP request sent, awaiting response... 301 Moved Permanently Location: http://www.google.com/ [following] --2012-06-12 21:29:38-- http://www.google.com/ Resolving www.google.com (www.google.com)... 74.125.236.179, 74.125.236.180, 74.125.236.176, ... Connecting to www.google.com (www.google.com)|74.125.236.179|:80... connected. HTTP request sent, awaiting response... 302 Found Location: http://www.google.co.in/ [following] --2012-06-12 21:29:38-- http://www.google.co.in/ Resolving www.google.co.in (www.google.co.in)... 74.125.236.184, 74.125.236.191, 74.125.236.183, ... Connecting to www.google.co.in (www.google.co.in)|74.125.236.184|:80... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] Saving to: `index.html.3' [ ] 13,383 --.-K/s in 0.04s 2012-06-12 21:29:39 (308 KB/s) - `index.html.3' saved [13383] gkr@gkr-desktop:~/Documents/curl$ This site just stops/hangs in awaiting response. gkr@gkr-desktop:~/Documents/curl$ wget grooveshark.com --2012-06-12 21:27:29-- http://grooveshark.com/ Resolving grooveshark.com (grooveshark.com)... 8.20.213.76 Connecting to grooveshark.com (grooveshark.com)|8.20.213.76|:80... connected. HTTP request sent, awaiting response... ^C gkr@gkr-desktop:~/Documents/curl$ Thanks

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  • Web server send outgoing request to specific isp gateway

    - by itsoft3g
    I have a server with 5 ISP connections, i am using Apache web server and php engine to run my application. Outgoing request to different API now needs to be send through a specific ISP (or a different IPs). All my API request are sent using PHP and Web server. I am not sure that php will directly communicate with Gateway or it send request via web server. Please help me to setup this. Thanks in advance.

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  • mod_rewrite issue | Request exceeded the limit of 10 internal redirects

    - by Chris Anarko Meow
    ok what Im doing normally works but since my rule "includes" itself is giving me issues and can't find a solution after hours working on different options. I have a .htaccess with: RewriteEngine On RewriteBase / RewriteCond %{REQUEST_URI} !^/3.15.0/(.*) RewriteRule ^(.*)$ /3.15.0/$1 [L] this is for my software versions, I have a program that can request sometimes versions that are updated and in the server may be behind a couple version so I want to be able to say that whatever is comming in forward to the latest version that in this example is 3.15.0 /var/www/nameblabla/3.15.0 my .htaccess is on /var/www/nameblabla/.htaccess so the first Condition is to ignore request that already has the right path and version.. the second should be to grab all request and forward to 3.15.0... and of course not loose the path to the files I want from inside that should be the same. so far I can only get it to redirect to such directory but will loose the path and others I get the "Request exceeded the limit of 10 internal redirects" I guess this is because Im including the 3.15.0 path Any help or another way to do this with out mod_rewrite?

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  • Does a VPN certificate request need to be encrypted

    - by Kernel Panic
    We have a Cisco 3000 VPN concentrator and use the Cisco VPN client to generate certificate requests, which we then create/authenticate on our certificate server. When the help desk generates the request, they sometimes email that to me, then I generate the certificate on the server. Does the request need to be encrypted? Until the certificate gets generated is there something in the request itself that would need to remain secret? Thank you.

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  • Partial Client Certificate request for Apache HTTP

    - by Joshua
    I have an Apache HTTP Server with SSL enabled and requesting a Client Certificate. How do I set up Apache to only request the certificate when a user hits a certain part of the website? Example: /myapp/ should not request the cert /myapp2/ should request the cert Note: These applications are being served using the mod-jk

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  • How do I keep track of the session for each servlet request, until I use it? Singletons wont work?

    - by corgrath
    For each servlet request I get, I pass, perhaps, 10 methods before I am at where I need to check something in the session and I need the HttpSession. The only way I can get the HttpSession is from the HttpServletRequest, correct? How do I keep track of the session for each servlet request? Unfortuantly I cannot simple make a singleton (ex, SessionInformation.instance().getAttribute("name")) because that session would then be used over all requests. Is there a way to store the session globally for each request without having to pass it (or it's information) down all the methods just in case I need it?

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  • JMS equivalent in .Net

    - by rauts
    Hi All, I am trying to make an common abstract interface over the messaging infrastructure in our company. The design goal is to 2 fold. 1 is to hide the complexity of programming from the developers (i know its not very complex but still simplify it further) and 2 is to make the developers independent of the vendor specific messaging infrastructure (i.e. it can be MQSeries or EMS or MSMQ). The very common option is using the WCF layer over the messaging infrastructure. Use the MQSeries Custom channel for WCF or use EMS custom channle for WCF. But both are ruled out due to lack of proper version of MQSeries and EMS. Can someone please suggest what are the possible solutions to this problem. One which i can think of the to have a custom wrapper like JMS. Has anyone ever tried something similar before. Any help would be fantastic. by the way, i am trying to create this wrapper in C# 3.5. Regards

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  • ????????WebLogic Server - Enterprise Grid Messaging |WebLogic Channel|??????

    - by ???02
    WebLogic Server????????????????????????????Enterprise Grid Messaging?????????? ?? ????????????????????????????????????????????????WebLogic Server?Java EE?JMS???JMS????????????JMS???????????????????????????????????????????????????????????????????????????????11gR1???Enterprise Grid Messaging????Oracle Advanced Queuing?Oracle RAC???????????????? ?????Enterprise Grid Messaging????????????????????????? ????¦WebLogic JMS????¦JMS??¦?????????¦?????????¦?????????????????¦Advanced Queue???? ???????????????????????????http://www.oracle.com/technetwork/jp/ondemand/application-grid/wls11g-egm-201107-otn-sc-439529-ja.pdf

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  • Rewind request body stream

    - by Despertar
    I am re-implementing a request logger as Owin Middleware which logs the request url and body of all incoming requests. I am able to read the body, but if I do the body parameter in my controller is null. I'm guessing it's null because the stream position is at the end so there is nothing left to read when it tries to deserialize the body. I had a similar issue in a previous version of Web API but was able to set the Stream position back to 0. This particular stream throws a This stream does not support seek operations exception. In the most recent version of Web API 2.0 I could call Request.HttpContent.ReadAsStringAsync()inside my request logger, and the body would still arrive to the controller in tact. How can I rewind the stream after reading it? or How can I read the request body without consuming it? public class RequestLoggerMiddleware : OwinMiddleware { public RequestLoggerMiddleware(OwinMiddleware next) : base(next) { } public override Task Invoke(IOwinContext context) { return Task.Run(() => { string body = new StreamReader(context.Request.Body).ReadToEnd(); // log body context.Request.Body.Position = 0; // cannot set stream position back to 0 Console.WriteLine(context.Request.Body.CanSeek); // prints false this.Next.Invoke(context); }); } } public class SampleController : ApiController { public void Post(ModelClass body) { // body is now null if the middleware reads it } }

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  • Java JDBC: Reply.fill()

    - by Harv
    Hi, I get the following exception at times: com.ibm.db2.jcc.b.gm: [jcc][t4][2030][11211][3.50.152] A communication error occurred during operations on the connection's underlying socket, socket input stream, or socket output stream. Error location: Reply.fill(). Message: Connection reset. ERRORCODE=-4499, SQLSTATE=08001 The problem is that, the code executes successfully for quite some time and then suddenly I get this exception. However it runs perfrectly when I run the code again. Could some one please tell me what could be wrong and provide me some pointers to resolve this. Thanks, Harveer

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  • how to queue function behind ajax request

    - by user1052335
    What I'm asking is conceptual rather than why my code doesn't work. I'm trying to make a web app that displays content fetched from a database in a sequence, one at a time, and then waits for a response from the user before continuing to the next one. I'm working with javascript on the client side with the JQuery library and php on the server side. In theory, there's time while waiting for the user's input to fetch information from the server using an AJAX request and have it ready for the use by the time he clicks the button, but there's also a chance that such an AJAX request hasn't completed when he clicks the button. So I need something like pseudocode: display current information fetch next data point from the server in the background onUserInput { if ( ajax request complete) { present the information fetched in this request } else if (ajax request not complete) { wait for ajax request complete present information to user } My question is this: how does one implement this " else if (ajax request not complete) { wait for ajax request complete " part. I'm currently using JQuery for my AJAX needs. I'm somewhat new to working with AJAX, and I did search around, but I didn't find anything that seemed on point. I don't know what tools I should use for this. Some kind of queue maybe? I don't need to be spoon fed. I just need to know how this is done, using what tools or if my desired outcome would be accomplished in some other way entirely. Thanks.

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  • PHP cURL error: "Empty reply from server"

    - by ABach
    All, I have a class function to interface with the RESTful API for Last.FM - its purpose is to grab the most recent tracks for my user. Here it is: private static $base_url = 'http://ws.audioscrobbler.com/2.0/'; public static function getTopTracks($options = array()) { $options = array_merge(array( 'user' => 'bachya', 'period' => NULL, 'api_key' => 'xxxxx...', // obfuscated, obviously ), $options); $options['method'] = 'user.getTopTracks'; // Initialize cURL request and set parameters $ch = curl_init(); curl_setopt_array($ch, array( CURLOPT_URL => self::$base_url, CURLOPT_POST => TRUE, CURLOPT_POSTFIELDS => $options, CURLOPT_RETURNTRANSFER => TRUE, CURLOPT_TIMEOUT => 30, CURLOPT_USERAGENT => 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)' )); $results = curl_exec($ch); return $results; } This returns "Empty reply from server". I know that some have suggested that this error comes from some fault in network infrastructure; I do not believe this to be true in my case. If I run a cURL request through the command line, I get my data; the Last.FM service is up and accessible. Before I go to those folks and see if anything has changed, I wanted to check with you fine folks and see if there's some issue in my code that would be causing this. Thanks!

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  • How to pass value in url using web request GET method asp.net

    - by Narasi
    Am new to .Net and web service..i like to pass id through url..how to do that?whether it was done post or get method?guide me string url = "http://XXXXX//"+id=22; WebRequest request = WebRequest.Create(url); request.Proxy.Credentials = new NetworkCredential(xxxxx); request.Credentials = CredentialCache.DefaultCredentials; //add properties request.Method = "GET"; request.ContentType = "application/json"; //convert byte[] byteArray = Encoding.UTF8.GetBytes(data); request.ContentLength = byteArray.Length; //post data Stream streamdata = request.GetRequestStream(); streamdata.Write(byteArray, 0, byteArray.Length); streamdata.Close(); //response WebResponse response = request.GetResponse(); // Get the stream containing content returned by the server. Stream dataStream = response.GetResponseStream(); // Open the stream using a StreamReader for easy access. StreamReader reader = new StreamReader(dataStream); // Read the content. string responseFromServer = reader.ReadToEnd(); // Clean up the streams and the response. reader.Close(); response.Close(); Thanks in advance

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  • Help with a cryptic error message with KGDB - Bogus trace status reply from target: E22

    - by fortran
    Hi, I'm using gdb to connect to a 2.6.31.13 linux kernel patched with KGDB over Ethernet, and when I try to detach the debugger I get this: (gdb) quit A debugging session is active. Inferior 1 [Remote target] will be killed. Quit anyway? (y or n) y Bogus trace status reply from target: E22 after that the session is still open, I can keep going on and on with ctrl+d, and the debugger doesn't exit. I've searched for that message in google and there are just 5 results (and none of them are useful :-/ ). Any idea of what could it be and how to fix it?

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  • Praw (Redditt API) How to retrieve replies to a comment past 10 levels deep

    - by jpreed00
    Ok, so I've written some code that, for all intents and purposes, should work: def checkComments(comments): for comment in comments: print comment.body checkComments(comment.replies) def processSub(sub): sub.replace_more_comments(limit=None, threshold=0) checkComments(sub.comments) #login and subreddit init stuff here subs = mysubreddit.get_hot(limit=50) for sub in subs: processSub(sub) However, given a submission that has 50 nested replies like so: root comment -> 1st reply -> 2nd reply -> 3rd reply ... -> 50th reply The above code only prints: root comment 1st reply 2nd reply 3rd reply 4th reply 5th reply 6th reply 7th reply 8th reply 9th reply Any idea how I can get the remaining 41 levels of replies? Or is this a praw limitation?

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  • Java JMS Messaging

    - by London
    Hello, I have a working example of sending message to server and server receiving it via qpid messaging. Here is simple hello world to send to server : http://pastebin.com/M7mSECJn And here is server which receives requests and sends response(the current client doesn't receive response) : http://pastebin.com/2mEeuzrV Here is my property file : http://pastebin.com/TLEFdpXG They all work perfectly, I can see the messages in the qpid queue via Qpid JMX management console. These examples are downloaded from https://svn.apache.org/repos/asf/qpid/trunk/qpid/java/client/example (someone may need it also). I've done Jboss messaging using spring before, but I can't manage to do the same with qpid. With jboss inside applicationsContext I had beans jndiTemplate, conectionFactory, destinationQueue, and jmscontainer like this : <!-- Queue configuration --> <bean id="jndiTemplate" class="org.springframework.jndi.JndiTemplate"> <property name="environment"> <props> <prop key="java.naming.factory.initial">org.jnp.interfaces.NamingContextFactory</prop> <prop key="java.naming.provider.url">jnp://localhost:1099</prop> <prop key="java.naming.factory.url.pkgs">org.jboss.naming:org.jnp.interfaces</prop> <prop key="java.naming.security.principal">admin</prop> <prop key="java.naming.security.credentials">admin</prop> </props> </property> </bean> <bean id="connectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiTemplate" ref="jndiTemplate" /> <property name="jndiName" value="ConnectionFactory" /> </bean> <bean id="queueDestination" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiTemplate" ref="jndiTemplate" /> <property name="jndiName"> <value>queue/testQueue</value> </property> </bean> <bean id="jmsContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="connectionFactory" ref="connectionFactory" /> <property name="destination" ref="queueDestination" /> <property name="messageListener" ref="listener" /> </bean> and of course sender and listener : Now I'd like to rewrite this qpid example using spring context logic. Can anyone help me?

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  • Only root object on request is deserialized when using Message.GetBody<>

    - by user324627
    I am attempting to create a wcf service that accepts any input (Action="*") and then deserialize the message after determining its type. For the purposes of testing deserialization I am currently hard-coding the type for the test service. I get no errors from the deserialization process, but only the outer object is populated after deserialization occurs. All inner fields are null. I can process the same request against the original wcf service successfully. I am deserializing this way, where knownTypes is a type list of expected types: DataContractSerializer ser = new DataContractSerializer(new createEligibilityRuleSet ().GetType(), knownTypes); createEligibilityRuleSet newReq = buf.CreateMessage().GetBody<createEligibilityRuleSet>(ser); Here is the class and sub-classes of the request object. These classes are generated by svcutil using a top down approach from an existing wsdl. I have tried replacing the XmlTypeAttributes with DataContracts and the XmlElements with DataMembers with no difference. It is the instance of CreateEligibilityRuleSetSvcRequest on the createEligibilityRuleSet object that is null. I have included the request retrieved from the request at the bottom /// <remarks/> [System.CodeDom.Compiler.GeneratedCodeAttribute("svcutil", "3.0.4506.2152")] [System.SerializableAttribute()] [System.Diagnostics.DebuggerStepThroughAttribute()] [System.ComponentModel.DesignerCategoryAttribute("code")] [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://RulesEngineServicesLibrary/RulesEngineServices")] public partial class createEligibilityRuleSet { private CreateEligibilityRuleSetSvcRequest requestField; /// <remarks/> [System.Xml.Serialization.XmlElementAttribute(Form = System.Xml.Schema.XmlSchemaForm.Unqualified, IsNullable = true, Order = 0)] public CreateEligibilityRuleSetSvcRequest request { get { return this.requestField; } set { this.requestField = value; } } } /// <remarks/> [System.CodeDom.Compiler.GeneratedCodeAttribute("svcutil", "3.0.4506.2152")] [System.SerializableAttribute()] [System.Diagnostics.DebuggerStepThroughAttribute()] [System.ComponentModel.DesignerCategoryAttribute("code")] [System.Xml.Serialization.XmlTypeAttribute(Namespace = "http://RulesEngineServicesLibrary")] public partial class CreateEligibilityRuleSetSvcRequest : RulesEngineServicesSvcRequest { private string requestField; /// <remarks/> [System.Xml.Serialization.XmlElementAttribute(Form = System.Xml.Schema.XmlSchemaForm.Unqualified, Order = 0)] public string request { get { return this.requestField; } set { this.requestField = value; } } } [System.Xml.Serialization.XmlIncludeAttribute(typeof(CreateEligibilityRuleSetSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(ApplyMemberEligibilitySvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(CreateCompletionCriteriaRuleSetSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(CopyRuleSetSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(DeleteRuleSetByIDSvcRequest))] [System.CodeDom.Compiler.GeneratedCodeAttribute("svcutil", "3.0.4506.2152")] [System.SerializableAttribute()] [System.Diagnostics.DebuggerStepThroughAttribute()] [System.ComponentModel.DesignerCategoryAttribute("code")] [System.Xml.Serialization.XmlTypeAttribute(Namespace = "http://RulesEngineServicesLibrary")] public partial class RulesEngineServicesSvcRequest : ServiceRequest { } /// <remarks/> [System.Xml.Serialization.XmlIncludeAttribute(typeof(RulesEngineServicesSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(CreateEligibilityRuleSetSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(ApplyMemberEligibilitySvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(CreateCompletionCriteriaRuleSetSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(CopyRuleSetSvcRequest))] [System.Xml.Serialization.XmlIncludeAttribute(typeof(DeleteRuleSetByIDSvcRequest))] [System.CodeDom.Compiler.GeneratedCodeAttribute("svcutil", "3.0.4506.2152")] [System.SerializableAttribute()] [System.Diagnostics.DebuggerStepThroughAttribute()] [System.ComponentModel.DesignerCategoryAttribute("code")] [System.Xml.Serialization.XmlTypeAttribute(Namespace = "http://FELibrary")] public partial class ServiceRequest { private string applicationIdField; /// <remarks/> [System.Xml.Serialization.XmlElementAttribute(Form = System.Xml.Schema.XmlSchemaForm.Unqualified, Order = 0)] public string applicationId { get { return this.applicationIdField; } set { this.applicationIdField = value; } } } Request from client comes on Message body as below. Retrieved from Message at runtime. <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:rul="http://RulesEngineServicesLibrary/RulesEngineServices"> <soap:Header/> <soap:Body> <rul:createEligibilityRuleSet> <request> <applicationId>test</applicationId> <request>Perf Rule Set1</request> </request> </rul:createEligibilityRuleSet> </soap:Body> </soap:Envelope>

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