Databases
StackOverflow2013
Postsdbo
POUsing Jakarta HttpClient to mimic a POST network request
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUsing Jakarta HttpClient to mimic a POST network request
    primarykey
    data
    text
    <p>I try to mimic a network request send by a closed source application. The following is the network request snapshot captured from the closed source application :</p> <pre><code>- Http: Request, POST /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage Command: POST - URI: /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage? Location: /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage ProtocolVersion: HTTP/1.1 - ContentType: application/x-www-form-urlencoded MediaType: application/x-www-form-urlencoded Cache-Control: no-cache Pragma: no-cache UserAgent: Mozilla/4.0 (Windows XP 5.1) Java/1.6.0_06 Host: www.xxx.com:20000 Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 Connection: keep-alive ContentLength: 164 HeaderEnd: CRLF - payload: HttpContentType = application/x-www-form-urlencoded [SORT]: 0,1,0,10,5,0,KL,0 [FIELD]: 33,38,51,58,68,88,78,98,99,101,56,57,69,70,71,72,89,90,91,92,59,60,61,62,79,80,81,82 [LIST]: 1155.KL,1295.KL,7191.KL,0097.KL,2267.KL </code></pre> <p>I use httpclient to mimic the above request.</p> <pre><code>/** * @param args the command line arguments */ public static void main(String[] args) { try { // TODO code application logic here HttpClient httpClient = new HttpClient(); httpClient.getParams().setParameter(HttpMethodParams.USER_AGENT, "Mozilla/4.0 (Windows XP 5.1) Java/1.6.0_06"); PostMethod post = new PostMethod("http://www.xxx.com:20000/%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage?"); NameValuePair[] data = { new NameValuePair("SORT", "0,1,0,10,5,0,KL,0"), new NameValuePair("FIELD", "33,38,51,58,68,88,78,98,99,101,56,57,69,70,71,72,89,90,91,92,59,60,61,62,79,80,81,82"), new NameValuePair("LIST", "1155.KL,1295.KL,7191.KL,0097.KL,2267.KL") }; post.setRequestBody(data); httpClient.executeMethod(post); System.out.println(post.getResponseBodyAsString()); } catch (Exception exp) { exp.printStackTrace(); } } </code></pre> <p>However, there are no respond from server side. I try to capture my own network request snapshot :</p> <pre><code>- Http: Request, POST /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage Command: POST - URI: /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage Location: /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage ProtocolVersion: HTTP/1.1 UserAgent: Mozilla/4.0 (Windows XP 5.1) Java/1.6.0_06 Host: www.xxx.com:20000 ContentLength: 234 - ContentType: application/x-www-form-urlencoded MediaType: application/x-www-form-urlencoded HeaderEnd: CRLF - payload: HttpContentType = application/x-www-form-urlencoded SORT: 0%2C1%2C0%2C10%2C5%2C0%2CKL%2C0 FIELD: 33%2C38%2C51%2C58%2C68%2C88%2C78%2C98%2C99%2C101%2C56%2C57%2C69%2C70%2C71%2C72%2C89%2C90%2C91%2C92%2C59%2C60%2C61%2C62%2C79%2C80%2C81%2C82 LIST: 1155.KL%2C1295.KL%2C7191.KL%2C0097.KL%2C2267.KL </code></pre> <p>It seems that there are two major different :</p> <p>(1) URI</p> <p>(2) payload</p> <p>Is there anything I miss out in my httpclient code?</p> <p>After several experiment, I realize is that, httpclient perform URL encoding on my payload. It explicitly turns </p> <p>1155.KL,1295.KL,7191.KL,0097.KL,2267.KL</p> <p>to</p> <p>1155.KL%2C1295.KL%2C7191.KL%2C0097.KL%2C2267.KL</p> <p>To avoid this, I write a test code. The following test code works!</p> <pre><code>try { Socket socket = new Socket("www.xxx.com", 20000); PrintWriter out = new PrintWriter(socket.getOutputStream(), true); final String body = "[SORT]=0,1,0,10,5,0,KL,0&amp;[FIELD]=33,38,51,58,68,88,78,98,99,101,56,57,69,70,71,72,89,90,91,92,59,60,61,62,79,80,81,82&amp;[LIST]=1155.KL,1295.KL,7191.KL,0097.KL,2267.KL"; final int length = body.length(); final String s = "POST /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage? HTTP/1.1\r\nContent-Type: application/x-www-form-urlencoded\r\nCache-Control: no-cache\r\nPragma: no-cache\r\nUser-Agent: Mozilla/4.0 (Windows XP 5.1) Java/1.6.0_06\r\nHost: www.xxx.com:20000\r\nAccept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2\r\nConnection: keep-alive\r\nContent-Length: "+length+"\r\n\r\n" + body; out.println(s); BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); while(true) { String ss = in.readLine(); if (ss == null) break; System.out.println(ss); } } catch (Exception exp) { } </code></pre> <p>The following is the captured snap-shot :</p> <pre><code> Frame: Number = 16, Captured Frame Length = 597, MediaType = ETHERNET + Ethernet: Etype = Internet IP (IPv4),DestinationAddress:[7C-04-20-00-01-00],SourceAddress:[01-00-01-00-00-00] + Ipv4: Src = 10.176.181.55, Dest = 202.75.55.23, Next Protocol = TCP, Packet ID = 956, Total IP Length = 583 + Tcp: Flags=...AP..., SrcPort=49253, DstPort=20000, PayloadLen=543, Seq=3920474750 - 3920475293, Ack=3537289604, Win=4380 (scale factor 0x2) = 17520 - Http: Request, POST /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage Command: POST + URI: /%5bvUpJYKw4QvGRMBmhATUxRwv4JrU9aDnwNEuangVyy6OuHxi2YiY=%5dImage? ProtocolVersion: HTTP/1.1 + ContentType: application/x-www-form-urlencoded Cache-Control: no-cache Pragma: no-cache UserAgent: Mozilla/4.0 (Windows XP 5.1) Java/1.6.0_06 Host: n2ntbfd03.asiaebroker.com:20000 Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 Connection: keep-alive ContentLength: 164 HeaderEnd: CRLF - payload: HttpContentType = application/x-www-form-urlencoded [SORT]: 0,1,0,10,5,0,KL,0 [FIELD]: 33,38,51,58,68,88,78,98,99,101,56,57,69,70,71,72,89,90,91,92,59,60,61,62,79,80,81,82 [LIST]: 1155.KL,1295.KL,7191.KL,0097.KL,2267.KL </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCheok Yan Cheng
    1. USCheok Yan Cheng
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POUsing Jakarta HttpClient to mimic a POST network request
      1. USposeid
      1. VTFavorite
    1. COCan you capture the raw request? Maybe the lists that appear in your snapshot are posted like this: SORT=0&SORT=1&SORT=0... but the software you are using for capturing the request is doing some pretty printing of the lists.
      singulars
      1. POUsing Jakarta HttpClient to mimic a POST network request
      1. USSerxipc
    2. CONow the real question is, how I can avoid HttpClient from performing URL encoding on my payload?
      singulars
      1. POUsing Jakarta HttpClient to mimic a POST network request
      1. USCheok Yan Cheng
    3. COPlease, try http://www.fiddler2.com/ or http://www.charlesproxy.com/ to capture the raw request so we can see how are the lists posted. Fiddler is free but only works on windows. Charles has free 30 day trial.
      singulars
      1. POUsing Jakarta HttpClient to mimic a POST network request
      1. USSerxipc
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload