Question

我正在尝试使用其请求标头将数据发布到closure-compiler.appspot.com。

这是应用程序的请求标题。

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset: ISO-8859-9,utf-8;q=0.7,*;q=0.3
Accept-Encoding: gzip,deflate,sdch
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.6,en;q=0.4
Cache-Control: max-age=0
Content-Length: 269
Content-Type: application/x-www-form-urlencoded
Host: closure-compiler.appspot.com
Origin: null
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko)       Chrome/14.0.794.0 Safari/535.1

这就是我在.NET中创建此请求所做的工作

HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://closure-compiler.appspot.com/compile");
req.Connection = "keep-alive";
req.Headers.Add("Cache-Control", "max-age=0");
req.Headers.Add("Origin","null");
req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.794.0 Safari/535.1";
req.ContentType = "application/x-www-form-urlencoded";
req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
req.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
req.Headers.Add("Accept-Language", "tr-TR,tr;q=0.8,en-US;q=0.6,en;q=0.4");
req.Headers.Add("Accept-Charset", " ISO-8859-9,utf-8;q=0.7,*;q=0.3");
req.Method = "POST";

Stream reqStr = req.GetRequestStream(); 
//this line give me an argumentexception 
//Keep-Alive and Close may not be set using this property.
//Parameter name: value

那么如何生成应用程序要我发送的标头？

Answer 1

如何使用WebClient。这将使您的代码更具可读性，除此之外，您不需要为正确的URL编码参数，关闭流，...而烦恼......：

class Program
{
    static void Main()
    {
        using (var client = new WebClient())
        {
            var values = new NameValueCollection
            {
                { "js_code", "var a = function(arg) { alert(arg); }; a('abc');" },
                { "compilation_level", "ADVANCED_OPTIMIZATIONS" },
                { "output_format", "text" },
                { "output_info", "compiled_code" },
            };
            var url = "http://closure-compiler.appspot.com/compile";
            var result = client.UploadValues(url, values);
            Console.WriteLine(Encoding.UTF8.GetString(result));
            // outputs 'alert("abc");' on the screen
        }
    }
}

Answer 2

如果我正确阅读THIS，您只需要设置ContentType，因此请尝试仅执行以下操作：

static void Main(string[] args)
{
    MemoryStream wStr = new MemoryStream();
    StreamWriter writer = new StreamWriter(wStr, Encoding.Default);
    writer.Write("js_code=" + HttpUtility.UrlEncode("alert('hello');// This comment should be stripped"));
    writer.Write("&compilation_level=" + HttpUtility.UrlEncode("WHITESPACE_ONLY"));
    writer.Write("&output_format=" + HttpUtility.UrlEncode("text"));
    writer.Write("&output_info=" + HttpUtility.UrlEncode("compiled_code"));
    writer.Flush();

    HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://closure-compiler.appspot.com/compile");
    req.ContentType = "application/x-www-form-urlencoded";
    req.Method = "POST";
    req.ContentLength = wStr.Length;

    Stream reqStr = req.GetRequestStream();
    reqStr.Write(wStr.ToArray(), 0, (int)wStr.Length);

    WebResponse res = req.GetResponse();
    Stream response = res.GetResponseStream();
    StreamReader reader = new StreamReader(response, Encoding.Default);

    Console.WriteLine(reader.ReadToEnd());
    Console.ReadLine();
}

它只对我有正确的顺序（req.ContentLength需要在写之前设置）和编码！

制作HttpWebRequest？发生ArgumentException错误

2 个答案: