Asked  7 Months ago    Answers:  5   Viewed   28 times

I need to use "HTTP Post" with WebClient to post some data to a specific URL I have.

Now, I know this can be accomplished with WebRequest but for some reasons I want to use WebClient instead. Is that possible? If so, can someone show me some example or point me to the right direction?



I just found the solution and yea it was easier than I thought :)

so here is the solution:

string URI = "";
string myParameters = "param1=value1&param2=value2&param3=value3";

using (WebClient wc = new WebClient())
    wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
    string HtmlResult = wc.UploadString(URI, myParameters);

it works like charm :)

Tuesday, June 1, 2021
answered 7 Months ago

Try following one

    $data = '{"id": "6"}';

    $url = "";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);                               
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: text/plain'));
    $jsonResponse = curl_exec($ch);
        echo 'Curl error: ' . curl_error($ch);

Firebase accept json object and you have to post $data as json object. And you can use Content-Type: application/x-www-form-urlencoded or Content-Type: text/plain

Saturday, May 29, 2021
answered 7 Months ago

I used:

QByteArray postData;

So & instead of newline after each parameter.

Monday, June 21, 2021
answered 6 Months ago

If you want to monitor the progress of an upload, you'll need to use UploadFileAsync instead of UploadData.

With UploadDataAsync you are supposed to manually chunk the file and display the progress (at least, that's what I've determined from my own experience in the matter though I haven't seen it written as such on MSDN).

What you're looking for is to use UploadFileAsync instead, which will call the UploadProgressChanged event correctly. You can then view the event args properties BytesSent and TotalBytesToSend which should be reflected correctly.

I assume the rationale behind this is that when you're sending data, you can loop over chunks of your data stream and manually increment your progress tracker whereas with a file you cannot (.NET will manage the entire upload for you). Personally, I feel there is something fishy because there is no reason for the UploadProgressChanged event to be called with invalid information in case of UploadDataAsync - either it is called with valid, correct info or it's not called at all.

At any rate, give UploadFileAsync a shot and see how that goes.

Thursday, August 5, 2021
answered 4 Months ago

It seems you found a bug in WebClient/WebRequest, though perhaps Microsoft put that in intentionally, who knows. Nonetheless, when you pass in TW., the URI class is translating that to TW without the period. Since WebClient/WebRequest parse strings into URI, your . is disappearing in that world.

You may have to use TcpClient to get around this and roll your own web client. Any variation of this:

TcpClient oClient = new TcpClient("", 80);

NetworkStream ns = oClient.GetStream();

StreamWriter sw = new StreamWriter(ns);
      "GET /{0} HTTP/1.1rnUser-Agent: {1}rnHost:",
           "MyTCPClient"  )

StringBuilder sb = new StringBuilder();

while (true)
    int i = ns.ReadByte(); // Inefficient but more reliable 
    if (i == -1) break;  // Other side has closed socket 
    sb.Append( (char) i );   // Accrue 'c' to save page data 


This will give you a 302 redirect, so just parse out the 'Location:' and execute the above again with the new location.

HTTP/1.1 302 Found
Date: Wed, 11 Nov 2009 19:29:27 GMT
Server: lighttpd
X-Powered-By: PHP/5.2.4-2ubuntu5.7
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-type: text/html; charset=UTF-8
Content-Length: 0
Set-Cookie: SSID=668d5d0023e9885e1ef3762ef5e44033; path=/
Vary: Accept-Encoding
Connection: close
Friday, August 27, 2021
answered 4 Months ago
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