如何发送base64图像vie http Post请求？

Question

我正在创建将图像发送到web服务器的应用程序，我有一些代码问题:以下是来自网站的示例:

    Get your API key from your account settings page. Each user is given a unique authentication token, we call it API key. It's a 32-characters string that looks like:2abc234de56fab7c89012d34e56f6789
This key will be used for all your requests to our server.
Submit a HTTP POST request to our API URL: http://azcaptcha.com/in.php with parameters corresponding to the type of your captcha.
Server will return captcha ID or an error code if something went wrong.
Make a timeout: 20 seconds for ReCaptcha, 5 seconds for other types of captchas.
Submit a HTTP GET request to our API URL: http://azcaptcha.com/res.php to get the result.
If captha is already solved server will return the answer in format corresponding to the type of your captcha.
By default answers are returned as plain text like: OK|Your answer. But answer can also be returned as JSON {"status":1,"request":"TEXT"} if json parameter is used.
If captcha is not solved yet server will return CAPCHA_NOT_READY result. Repeat your request in 5 seconds.
If something went wrong server will return an error code.
          

下面是Base64示例表单

<form method="post" action="http://azcaptcha.com/in.php">
<input type="hidden" name="method" value="base64">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
The CAPTCHA file body in base64 format:
<textarea name="body">BASE64_FILE</textarea>
<input type="submit" value="Upload and get the ID">
</form> 

但是当我试图发送它时，我从服务器上得到错误，base64文件是不可读的，但是如果我通过HTML页面发送它，与base64示例中的代码一起，它就会工作，下面是我的C#代码:

byte[] imageArray = System.IO.File.ReadAllBytes(@"C:\Users\Cvetan Tokov\Desktop\New folder\rep.png");
            string base64ImageRepresentation = Convert.ToBase64String(imageArray);
            richTextBox1.Text = base64ImageRepresentation;
           
             string key = "MY API KEY";
             ASCIIEncoding encoding = new ASCIIEncoding();
             string postData = richTextBox1.Text;

             byte[] data = encoding.GetBytes(postData);
             WebRequest request = WebRequest.Create("http://azcaptcha.com/in.php?key=MY API KEY&method=base64");
             request.Method = "post";
            
             request.ContentType = "text/html; charset=windows-1252";

            request.ContentLength = data.Length;

             using (Stream stream = request.GetRequestStream())
             {
                 stream.Write(data, 0, data.Length);
             }

这段代码没有以正确的顺序发送base64字符串从服务器读取，有人能帮我从C#中的示例创建表单吗。

事先谢谢你

Answer 1

我建议你使用网络嗅探器。 例如，HTTP分析器。 打开它，通过浏览器和通过你的app发送一个请求，然后比较一下有什么不同--主要看到“标题”和“发布数据”选项卡。