CHttp... Post with "action"

[MikeAThon]

The best way to see the content of a valid http POST request is to look at the content of a request from a working program, like your browser.

Install an http tracer or debugger, which will log all http communications going out of your machine. Then, go to a site that has html for a form on it, click the button on site, and then look at the output from the tracer utility.

A quick Google search turned up two candidates:

HttpTracer from Lazy Dog Utilities at http://www.lazydogutilities.com/index.htm

Fiddler, a HTTP Debugging Proxy at http://www.fiddlertool.com/fiddler/

As a test, I quickly downloaded and installed HttpTracer, and set my browser (which is IE) to use it as a proxy (I set the proxy to 127.0.0.1 on port 8010, as explained in the Help file). On this page (i.e., the CodeGuru formu) the html includes a form with a "submit reply" and a "preview post" button. When I press the "preview post" button, HttpTracer logs the request as follows:

POST http://www.codeguru.com/forum/newreply.php HTTP/1.0
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword, application/x-quickviewplus, application/x-shockwave-flash, */*
Referer: http://www.codeguru.com/forum/newreply.php
Accept-Language: en-us
Content-Type: application/x-www-form-urlencoded
Proxy-Connection: Keep-Alive
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Host: www.codeguru.com
Content-Length: 1320
Pragma: no-cache
Cookie: pmt=1; bbuserid=85023; cguserid=MikeAThon; bbpassword=ffffd9b1fffffffffffffffdee88ffff; vbcodemode=1; bbsessionhash=ed4bb4b7f7e55fb47ec1bb75e4f627f0; bbthread_lastview=ax2x-ix339109ysx10x%221115052487%22yix338949ysx10x%221115074342%22y_; RMID=3fcfad0b42717e60

title=Re%3A+CHttp...+Post+with+%22action%22&mode=1&message=The+best+way+to+see+the+content+of+a+valid+http+POST+request+is+to+look+at+the+content+of+a+request+from+a+working+program%2C+like+your+browser.%0D%0A%0D%0AInstall+an+http+tracer+or+debugger%2C+which+will+log+all+http+communications+going+out+of+your+machine.++Then%2C+go+to+a+site+that+has+html+for+a+form+on+it%2C+click+the+button+on+site%2C+and+then+look+at+the+output+from+the+tracer+utility.%0D%0A%0D%0AA+quick+Google+search+turned+up+two+candidates%3A%0D%0A%0D%0AHttpTracer+from+Lazy+Dog+Utilities+at+http%3A%2F%2Fwww.lazydogutilities.com%2Findex.htm%0D%0A%0D%0AFiddler%2C+a+HTTP+Debugging+Proxy+at+http%3A%2F%2Fwww.fiddlertool.com%2Ffiddler%2F%0D%0A%0D%0AAs+a+test%2C+I+quickly+downloaded+and+installed+HttpTracer%2C+and+set+my+browser+%28which+is+IE%29+to+use+it+as+a+proxy+%28I+set+the+proxy+to+127.0.0.1+on+port+8010%2C+as+explained+in+the+Help+file%29.++On+this+page+%28i.e.%2C+the+CodeGuru+formu%29+the+html+includes+a+form+with+a+%22submit+reply%22+and+a+%22preview+post%22+button.++When+I+press+the+%22preview+post%22+button%2C+HttpTracer+logs+the+request+as+follows%3A%0D%0A%0D%0A&iconid=0&s=&do=postreply&t=338949&p=1146221&posthash=dc67ffed7dc20a849ede69da6e45dc59&poststarttime=1115086873&preview=Preview+Post&parseurl=1&emailupdate=1&rating=0

You can use this output to ensure that your own code matches.

You can also "see" what your code is sending out since the Wininet functions piggy-back on the proxy that you set into IE (at least I think they do).

HTH,
Mike

[HoustonMcDog1]

ok. A few more questions.
What exactly would my "File type" be? .txt? And do I have to read in the whole file in a huge string to put into "File contents"?


Thanks.

P.S. I tried the httptracer and since I'm going directly to a router, not a regular web page, the new settings for IE that I had to put in, made my browser not connect to the router anymore. Thanks for that suggestion though. Made a lot of sense.

[hankdane]

I don't know what the file type would be. What does the file look like?

If you want, you can post the file and the form it's submitted with. (If the form is any different at all from what you've already posted). I can use it to post against an inspection page here, which would reveal the file type and the exact posted contents, at least.

[HoustonMcDog1]

I've attached the file. It's extension is .dat but it's really a text file.

Also here is what I got off the router web page.

Let me know if you need anything else.



<strong>Router Configuration Upload</strong>
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
<td>
<FORM action="/cgi-bin/config" method="POST" enctype="multipart/form-data">

<p><INPUT TYPE=FILE SIZE=60 NAME="CONFIG" id="browse"></p>
<p><INPUT type="submit" value="Load" id="submit"></p>
</FORM>

[Bamirasta]

Hey, I'm working on a Upload tool So far i has been a succes thanks to this Thread. I've recently mad a GET request which work out great. But now i want to make a POST request. I know what kind of dat is being sent to the server. I only don't know how to fit all that data into 1 string. Here is the data that i want to Post:

-----------------------------24822581126073
Content-Disposition: form-data; name="stage"

2
-----------------------------24822581126073
Content-Disposition: form-data; name="username"

admin
-----------------------------24822581126073
Content-Disposition: form-data; name="password"

1234
-----------------------------24822581126073
Content-Disposition: form-data; name="title"

Kill
-----------------------------24822581126073
Content-Disposition: form-data; name="tags"

Kill
-----------------------------24822581126073
Content-Disposition: form-data; name="comment"

Kill test
-----------------------------24822581126073
Content-Disposition: form-data; name="password"; filename="kill.txt"
Content-Type: text/plain

kill
-----------------------------24822581126073--

Thanks,

Bami

[hankdane]

You don't have to do anything to 'make it into one string.' Just change the form action type to POST.

[MikeAThon]

[Use code tags when posting code]

... I have trouble with converting the dwRead to String.

I think you are referring to this line, which the compiler is (hopefully) choking on:

str = dwRead; // str is a CString

Try this:

str.Format( T("%d), dwRead );

Note that if you are compiling a Unicode build, the resulting string will be Unicode and might not look like what you expect.

Mike

[Bamirasta]

Ok, what do you suggest me to do. But what am exactly suppose to send? The amount of bytes read?
Am i suppose to send this:

Content-Disposition: form-data; name="password"; filename="[file]"
Content-Type: text/plain

filecontent
-----------------------------177603185628345--