. Net Standard HttpClient Package HTT request common operations collation

One, common HTTP operation

1.Get request, with parameters, no parameters

2.Post request, with parameters, no parameters

3. Simple File Download

    /// <summary>    ///HTTP protocol Request method Encapsulation/// </summary>     Public classNethelper {#regionGET request/// <summary>        ///GET request, no parameter/// </summary>        /// <param name= "url" ></param>        /// <returns></returns>         Public Static Asynctask<string> Getasync (stringURL) {HttpClient Client=NewHttpClient (); Httpresponsemessage resp=awaitclient.            Getasync (URL); //Get response status//respmsg.statuscode==200 Request succeeded//GET Request ContentHttpcontent respcontent =resp.            Content; return awaitRespcontent.readasstringasync (); }        /// <summary>        ///Get request, specifying parameters/// </summary>        /// <param name= "url" ></param>        /// <param name= "dic" ></param>        /// <returns></returns>         Public Static Asynctask<string> Getasync (stringURL, dictionary<string,string>dic) {//parameter HandlingStringBuilder Builder =NewStringBuilder (); Builder.            Append (URL); if(DIC. Count >0) {Builder. Append ("?"); inti =0; foreach(varIteminchdic) {if(I >0) Builder. Append ("&"); Builder. AppendFormat ("{0}={1}", item. Key, item.                    Value); I++; }            }            return awaitGetasync (builder.        ToString ()); }        /// <summary>        ///GET request-synchronous processing/// </summary>        /// <param name= "url" ></param>        /// <returns></returns>         Public Static stringGet (stringURL) {Task<string> result =getasync (URL); Result.            Wait (); returnresult.        Result; }        /// <summary>        ///GET request-synchronous processing/// </summary>        /// <param name= "url" >Request Address</param>        /// <param name= "dic" >Request Parameters</param>        /// <returns></returns>         Public Static stringGet (stringURL, dictionary<string,string>dic) {//parameter HandlingStringBuilder Builder =NewStringBuilder (); Builder.            Append (URL); if(DIC. Count >0) {Builder. Append ("?"); inti =0; foreach(varIteminchdic) {if(I >0) Builder. Append ("&"); Builder. AppendFormat ("{0}={1}", item. Key, item.                    Value); I++; }            }            returnGet (builder.        ToString ()); }        #endregion        #regionPost Request Processing/// <summary>        ///Post request, no reference/// </summary>        /// <param name= "url" ></param>        /// <returns></returns>         Public Static Asynctask<string> Postasync (stringUrlstringContent ="") {HttpClient client=NewHttpClient (); using(MemoryStream ms =NewMemoryStream ()) {                byte[] bytes =Encoding.Unicode.GetBytes (content); Ms. Write (Bytes,0, Bytes.                Length); Httpcontent HC=Newstreamcontent (MS); Httpresponsemessage resp=awaitClient. Postasync (URL,NULL); return awaitresp.            Content.readasstringasync (); }        }        /// <summary>        ///Post request, processing parameters/// </summary>        /// <param name= "url" ></param>        /// <param name= "dic" ></param>        /// <returns></returns>         Public Static Asynctask<string> Postasync (stringURL, dictionary<string,string>dic) {HttpClient client=NewHttpClient (); Formurlencodedcontent Data=Newformurlencodedcontent (DIC); varR =awaitclient.            Postasync (URL, data); return awaitR.content.readasstringasync (); //client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("text/html")); //client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("Application/xhtml+xml")); //client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("Application/xml", 0.9)); //client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("IMAGE/WEBP")); //client.            DEFAULTREQUESTHEADERS.ACCEPT.ADD (New Mediatypewithqualityheadervalue ("*/*", 0.8)); //HC. Headers.add ("useragent", "mozilla/5.0" (Windows NT 6.1;            WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/31.0.1650.57 safari/537.36 "); //HC.            Headers.add ("Timeout", timeout.tostring ()); //HC. Headers.add ("KeepAlive", "true");        }        /// <summary>        ///POST request, synchronous, no parameter/// </summary>        /// <param name= "url" ></param>        /// <param name= "content" ></param>        /// <returns></returns>         Public Static stringPost (stringUrlstringContent ="") {Task<string> str =postasync (URL, content); Str.            Wait (); returnStr.        Result; }        /// <summary>        ///Post request, synchronization, parameter handling/// </summary>        /// <param name= "url" ></param>        /// <param name= "dic" ></param>        /// <returns></returns>         Public Static stringPost (stringURL, dictionary<string,string>dic) {Task<string> str =postasync (URL, dic); Str.            Wait (); returnStr.        Result; }        #endregion        #regionDownload file processing/// <summary>        ///Download File/// </summary>        /// <param name= "url" >Link Address</param>        /// <param name= "target" >Storage Address</param>        /// <returns></returns>         Public Static BOOLDownLoad (stringUrlstringtarget) {            Try{HttpClient Client=NewHttpClient (); vart =client.                Getbytearrayasync (URL);                T.wait (); varbytes =T.result; using(FileStream fs =NewFileStream (target, FileMode.Create)) {fs. Write (Bytes,0, Bytes.                    Length); Fs.                Close (); }                return true; }            Catch(Exception ex) {Throw NewException ("failed to download the file,", ex); }        }        #endregion    }

More:

Creation and use of the. Net Standard Class Library

. Net Standard HTTP Request instance

Introduction to. Net Standard

. Net Standard HttpClient Package HTT request common operations collation