Post Data To Web Api Like JavaScript

Question

User-19694853 posted

i have code in javascript  like this

 $('#submit').on('click', function (e) {
                    e.preventDefault();
                     
                        var rs = get_image();
                        var  _images = rs[0];
                        var   desc_ = rs[1];
                  
        
                   
                     jQuery.ajax({
                        type: "POST",
                        data: {
                            msisdn: "98780",
                            customertype: "1",
                            blob_: _images ,
                            desc_: desc_ ,
                            register_type: 1,
                            otp: "0",
                          
 
                        },
                        url: "mydomain.com/image-register",
.......
}

in C# i write like this

 var data = new  
                        {
                            msisdn = "87878",
                            customertype = "1",
                            blob_ = blob_images1,
                            desc_ = desc_images1,
                            register_type = "1",
                            otp = "",
                            
                        };
                        var content_message = new StringContent(data.ToString(), Encoding.UTF8, "application/json");
                         
                        client.DefaultRequestHeaders.Clear();
                        client.DefaultRequestHeaders.Add("Host", "mydomain.com");
                        client.DefaultRequestHeaders.Add("Referer", "https://mydomain.com/upload");
                        client.DefaultRequestHeaders.Add("Accept-Encoding", "gzip, deflate, br");
                        client.DefaultRequestHeaders.Add("Accept-Language", "en-GB,en;q=0.9,fr-FR;q=0.8,fr;q=0.7,en-US;q=0.6,en;q=0.5");
                        client.DefaultRequestHeaders.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8");
                        client.DefaultRequestHeaders.Add("Accept", "*/*"); 
                        client.DefaultRequestHeaders.Add("Access-Control-Allow-Origin", "*");
                        client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36");
                        client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));
                        
                        client.DefaultRequestHeaders.Add("X-Requested-With", "XMLHttpRequest");
                        
                        
                        
                        var _resultUpHinh = client.PostAsync("https://mydomain.com/image-register", content_message).Result;

                        _resultUpHinh.EnsureSuccessStatusCode();

List<ModelImage>  _image = new List<ModelImage>();
List<ModelImageDesc>  _desc = new List<ModelImageDesc>();
string[] filePaths = Directory.GetFiles(@"D:\temp\", "*.jpg");
for (int i = 0; i < filePaths.Length; i++)
{
var _modelImage = new ModelImage();
var _modelImageDesc = new ModelImageDesc();
string _retBase64String = ConvertToString();
_modelImage.blob_images = _retBase64String;
_modelImageDesc.desc_images = "";
_blob_image.Add(_modelImage);
_blob_desc.Add(_modelImageDesc);
}

when i run C# console this Error like this

{StatusCode: 403, ReasonPhrase: 'Forbidden', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
Connection: keep-alive
Vary: Accept-Encoding
X-Frame-Options: SAMEORIGIN
Date: Sun, 16 Sep 2018 09:00:27 GMT
Set-Cookie: sessionid=ayba5n75g14i0rkge3y7u40ee5ytnwm0; expires=Sun, 16-Sep-2018 09:30:27 GMT; httponly; Max-Age=1800; Path=/
Set-Cookie: TS0140a414=014743ac89c84ce1796f58ec5057d0ead455f0860df86fdc2767c5fa384f5707ea1d13c84e0a9cad77e6c00d1b6c8f31a78d781bd80c92fc866d422920d5ca16d8b8ff9788d09a5b1b737ed3fa0e125f23602997bb; Path=/
Transfer-Encoding: chunked
Content-Type: text/html
}}

how to slove that, thanks

Answer 1

User36583972 posted

Hi zjm_zjm,

Usually, the HTTP 403 is returned when the client is not permitted access to the resource for some reason besides authentication.

Firstly, please make sure the "https://mydomain.com/image-register" is correct and you can use some test tools(like postman) to get the response.

Then, you can try to change the following code

   var content_message = new StringContent(data.ToString(), Encoding.UTF8, "application/json");
                         

to

                var content_message = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
                var _resultUpHinh = client.PostAsync("https://mydomain.com/image-register", content_message).Result;
                string s = await _resultUpHinh.Content.ReadAsStringAsync();

HttpClient:

Finally, if the error still exists and your Web API is not the ASP.NET Web API project, please contact the developer and debug.

Best Regards,

Yong Lu

Answer 2

User-474980206 posted

if data you pass to $.ajax is a map used to create a url encoded form post. but your C# code is doing a json post, which may not be supported. also data.ToString(),  does not build a json string, only string with the class name.