Background Web request code (with Https,json submission)

Background Web request

namespaceXXXX. utilites{usingSystem; usingSystem.Collections.Generic; usingSystem.IO; usingSystem.IO.Compression; usingSystem.Net; usingSystem.Net.Security; usingSystem.Security.Cryptography.X509Certificates; usingSystem.Text;  Public classPosthttpresponse {#regionStatic FieldPrivate Static ReadOnly stringDefaultuseragent ="mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1;. NET CLR 1.1.4322;. NET CLR 2.0.50727)"; #endregion        #regionPublic Method Public Static stringPosthttpresponsejson (stringURL) {            stringJSON =string.            Empty; Encoding Encoding=Encoding.UTF8; HttpWebResponse Response= Createposthttpresponsejson (URL,NULL,NULL,NULL,NULL, Encoding,NULL); JSON=GetStream (Response, encoding); returnJSON; }         Public Static stringPosthttpresponsejson (stringUrlstringPostjson) {            stringJSON =string.            Empty; Encoding Encoding=Encoding.UTF8; HttpWebResponse Response= Createposthttpresponsejson (URL, Postjson,NULL,NULL,NULL, Encoding,NULL); JSON=GetStream (Response, encoding); returnJSON; }           /// <summary>        ///create HTTP requests for post-mode JSON data (including HTTPS site requests)/// </summary>        /// <param name= "url" >the requested URL</param>        /// <param name= "Parameters" >Dictionary of parameter names and parameter values accompanying the request post</param>        /// <param name= "Timeout" >Request time-out</param>        /// <param name= "useragent" >requested client browser information, can be empty</param>        /// <param name= "requestencoding" >encoding used when sending an HTTP request</param>        /// <param name= "cookies" >cookie information sent with an HTTP request, if authentication is not required can be null</param>        /// <returns></returns>         Public StaticHttpWebResponse Createposthttpresponsejson (stringUrlstringPostjson,stringParametersint? TimeoutstringUserAgent, Encoding requestencoding,stringreferer) {            if(string. IsNullOrEmpty (URL)) {Throw NewArgumentNullException ("URL"); }            if(requestencoding = =NULL)            {                Throw NewArgumentNullException ("requestencoding"); } HttpWebRequest Request=NULL; //If you are sending an HTTPS request            if(URL.) StartsWith ("HTTPS", StringComparison.OrdinalIgnoreCase)) {Servicepointmanager.servercertificatevalidationcallback=NewRemotecertificatevalidationcallback (CheckValidationResult); Request= WebRequest.Create (URL) asHttpWebRequest; Request. ProtocolVersion=Httpversion.version10; }            Else{Request= WebRequest.Create (URL) asHttpWebRequest; } request. Method="POST"; //when the server determines whether the client is submitting JSON dataRequest. ContentType ="Application/json;charset=utf-8"; Request. KeepAlive=true; if(!string. IsNullOrEmpty (useragent)) {request. UserAgent=useragent; }            Else{request. UserAgent=defaultuseragent; }            if(timeout. HasValue) {request. Timeout=timeout.            Value; }            //If you need post data            #regionPost parameter similar to QueryString formatif(Parameters! =NULL)            {                byte[] data =requestencoding.getbytes (parameters); using(Stream stream =request. GetRequestStream ()) {stream. Write (data,0, data.                    Length); Stream.                Close (); }            }            #endregion            #regionPost JSONif(!string. IsNullOrEmpty (Postjson)) {using(varStreamWriter =NewStreamWriter (Request. GetRequestStream ())) {//string json = "{\" user\ ": \" test\ "," +//"\" password\ ": \" Bla\ "}";StreamWriter.Write (Postjson);                    StreamWriter.Flush ();                StreamWriter.Close (); }            }            #endregion            if(!string. IsNullOrEmpty (Referer)) {request. Referer=Referer; } HttpWebResponse Response= Request. GetResponse () asHttpWebResponse; if(Request. Cookiecontainer! =NULL) {Response. Cookies=request. Cookiecontainer.getcookies (Request.            RequestUri); }            returnresponse; }        #endregion        #regionPrivate MethodPrivate Static BOOLCheckValidationResult (Objectsender, X509Certificate certificate, X509chain chain, sslpolicyerrors errors) {            return true;//Always accept        }        /// <summary>        ///Convert response to text/// </summary>        /// <param name= "Response" ></param>        /// <param name= "encoding" ></param>        /// <returns></returns>        Private Static stringGetStream (httpwebresponse response, Encoding Encoding) {Try            {                if(Response. StatusCode = =Httpstatuscode.ok) {Switch(response. Contentencoding.tolower ()) { Case "gzip":                            {                                stringresult =Decompress (response.                                GetResponseStream (), encoding); Response.                                Close (); returnresult; }                        default:                            {                                using(StreamReader sr =NewStreamReader (response. GetResponseStream (), encoding)) {stringresult =Sr.                                    ReadToEnd (); Sr.                                    Close (); Sr.                                    Dispose (); Response.                                    Close (); returnresult; }                            }                    }                }                Else{Response.                Close (); }            }            Catch(Exception e) {Throwe; }            return ""; }        Private Static stringDecompress (Stream stream, Encoding Encoding) {byte[] buffer =New byte[ -]; //int length = 0;            using(GZipStream GZ =NewGZipStream (Stream, compressionmode.decompress)) {                //GZipStream gzip = new GZipStream (res. GetResponseStream (), compressionmode.decompress);                using(StreamReader reader =NewStreamReader (GZ, encoding)) {                    returnReader.                ReadToEnd (); }                /*using (MemoryStream mstemp = new MemoryStream ()) {//extracted directly with the Read method Content, you cannot invoke properties such as length of the GZipStream instance, otherwise an error occurs: System.NotSupportedException: This operation is not supported, while (length = gz. Read (buffer, 0, buffer.                    Length))! = 0) {mstemp.write (buffer, 0, length); } return encoding.                GetString (Mstemp.toarray ()); }                 * */            }        }        #endregion    }}

Background Web request code (with Https,json submission)