I had a problem to process soapEnvelopeXml document using PostAsync method from IHttpClientFactory.
This is what I was trying to do :
var soapEnvelopeXml = ObjectToXMLDocumentConverter.ObjectAsXmlDocument(object);
var content = new StringContent(soapEnvelopeXml.ToString(), Encoding.UTF8, "text/xml");
var response = await client.PostAsync(endpoint, content);
This was producing 400 Bad Request error.
What I find as a solution to my problem is direct usage of SOAP string instead of first converting it to XML message :
var soapString = ObjectToSoapRequestConverter.ObjectSoapStringRequest(object);
using (var client = clientFactory.CreateClient())
{
client.DefaultRequestHeaders.Add(...);
client.DefaultRequestHeaders.Add(...);
var content = new StringContent(soapString, Encoding.UTF8, "text/xml");
using (var response = await client.PostAsync(endpoint, content))
{
var soapResponse = await response.Content.ReadAsStringAsync();
...
}
}
Related
I'm fairly new to use HTTPClient and sending REST requests to APIs, I'm currently practicing multipart upload using this Google Drive API endpoint:
POST https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart
There's an instruction that states there to split the request body into two parts, I tried to recreate this but was unable to do so.
https://developers.google.com/drive/api/guides/manage-uploads#multipart
Here's my current code:
async void UploadFile(StorageFile fileName)
{
using (HttpClient client = new HttpClient())
{
// Opens files and convert it to stream
var resultStream = await fileName.OpenReadAsync();
var fileStreamContent = new StreamContent(resultStream.AsStream());
// Create file MetaData
var fileMetaData = JsonConvert.SerializeObject(
new { name = fileName.Name, mimetype = fileName.ContentType });
// Create POST request
var requestMessage = new HttpRequestMessage(HttpMethod.Post, uploadFileEndpoint);
requestMessage.Headers.Authorization = new AuthenticationHeaderValue(tokenType, accessToken);
// Add request body
requestMessage.Content = new StringContent(fileMetaData, Encoding.UTF8, "application/json");
requestMessage.Content.Headers.ContentType = new MediaTypeHeaderValue("multipart/related");
var response = await client.SendAsync(requestMessage);
string responseString = await response.Content.ReadAsStringAsync();
output(responseString);
}
}
Any help would be greatly appreciated, thank you!
According to the documentation on Perform a multipart upload (HTTP tab), you need the MultipartFormDataContent as suggested by #Jeremy.
There are a few things needed to perform/migrate:
Add AuthenticationHeaderValue into client.DefaultRequestHeaders.Authorization.
Create a StreamContent instance, fileStreamContent (which you have done) and specify its Headers.ContentType.
Create a StringContent instance, stringContent (which you have done).
Append both StreamContent and StringContent into the MultipartFormDataContent instance, formData.
Specify the formData's Headers.ContentType as requested in API docs.
Post the formData with await client.PostAsync(/* API Url */, formData);
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(tokenType, accessToken);
// Opens files and convert it to stream
var resultStream = await fileName.OpenReadAsync();
var fileStreamContent = new StreamContent(resultStream.AsStream());
fileStreamContent.Headers.ContentType = new MediaTypeHeaderValue(fileName.ContentType);
// Create file MetaData
var fileMetaData = JsonConvert.SerializeObject(new { name = fileName.Name, mimetype = fileName.ContentType });
var stringContent = new StringContent(fileMetaData, Encoding.UTF8, "application/json");
// Create POST request
MultipartFormDataContent formData = new MultipartFormDataContent();
formData.Add(stringContent, "metadata");
formData.Add(fileStreamContent, "media");
formData.Headers.ContentType = new MediaTypeHeaderValue("multipart/related");
var response = await client.PostAsync(uploadFileEndpoint, formData);
string responseString = await response.Content.ReadAsStringAsync();
}
I have an endpoint in my ASP.NET Core 2.1 Controller
[HttpPost]
public async Task<bool> CheckStatus([FromBody] StatusModel model)
{
...code ommited
return true;
}
And I call this endpoint from other place in code like this:
await client.PostAsync('/CheckStatus', payloayd)
How can I retrive a bool value from this request?
Using Newtonsoft.Json, you can read the response of the request and parse it into a bool.
using Newtonsoft.Json;
public async Task<bool> GetBooleanAsync()
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var data = new { };
var url = "my site url";
var payload = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
var req = await client.PostAsync(url, payload);
var response = await req.Content.ReadAsStringAsync();
return JsonConvert.DeserializeObject<bool>(response);
}
}
UPDATE
Looking back on this from a few years on, this can be simplified without the use of Newtonsoft.Json to read the response, by simply parsing the string data to a boolean.
public async Task<bool> GetBooleanAsync()
{
var data = new { };
var url = "my site url";
var payload = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
using var client = new HttpClient();
var response = await client.PostAsync(url, payload);
var data = await response.Content.ReadAsStringAsync();
return boolean.Parse(data);
}
However, if your boolean value is returned in a JSON object, then Newtonsoft.Json could be used to read that value.
I writing app for UWP
I receive json from back end like this:
string url = "http://api.simplegames.com.ua/index.php/?wc_orders=all_orders";
{
string jsonString;
using (var httpClient = new System.Net.Http.HttpClient())
{
var stream = await httpClient.GetStreamAsync(url);
StreamReader reader = new StreamReader(stream);
jsonString = reader.ReadToEnd();
}
return jsonString;
}
I try to send POST request like this
OrdersList = new List<RootObject>(rootObjectData);
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = new Uri(#"http://api.simplegames.com.ua");
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
httpClient.DefaultRequestHeaders.AcceptEncoding.Add(new StringWithQualityHeaderValue("utf-8"));
string endpoint = #"/post_from_local.php";
try
{
HttpContent content = new StringContent(JsonConvert.SerializeObject(OrdersList), Encoding.UTF8, "application/json");
HttpResponseMessage response = await httpClient.PostAsync(endpoint, content);
if (response.IsSuccessStatusCode)
{
string jsonResponse = await response.Content.ReadAsStringAsync();
Debug.WriteLine(jsonResponse);
//do something with json response here
}
}
catch (Exception)
{
//Could not connect to server
//Use more specific exception handling, this is just an example
}
}
But, Back end dev said that he see empty row, but data is not received.
Thank's for help. Where is my error?
Change this line:
var stream = await httpClient.GetStreamAsync(url);
to:
var stream = httpClient.GetStreamAsync(url).Result;
I'm using this code to POST XML to a REST webservice, but am just getting a vague '500 Server Error'. If I paste the same XML into Fiddler it works perfectly, so what am I doing wrong?
using (var client = new HttpClient())
{
var httpContent = new StringContent(doc.ToString(), Encoding.UTF8, "text/xml");
var response = client.PostAsync(new Uri("httpsapiurl"),httpContent).Result;
if (response.IsSuccessStatusCode)
{
// EDITED: this isn't hit as IsSuccessStatusCode is always false
//Stream stream = await response.Content.ReadAsStreamAsync();
}
}
Could it be that you need to set the Content type on the request?
try
{
var httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("text/xml"));
HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Post, URL);
req.Content = new StringContent(doc.ToString(), Encoding.UTF8, "text/xml");
await httpClient.SendAsync(req).ContinueWith(async respTask =>
{
Debug.WriteLine(req.Content.ReadAsStringAsync());
};
}
catch (Exception ex)
{
}
Especially this line is important. I had similar problem with an API that refused to spit anything back when not setting the Content-Type header correct.
req.Content = new StringContent(doc.ToString(), Encoding.UTF8, "text/xml");
Don't know if it can help.
UPDATE 1
I think I am using incorrect URL, this doc says to use "https://www.googleapis.com/drive/v2/files" & this doc says to use "https://www.googleapis.com/upload/drive/v2/files?uploadType=multipart". Though I am getting same 400 bad request.
Can I use Google Drive upload REST API in background uploader class?
I am following this doc from Google Drive to upload files but I am getting 400 - Bad request. What's wrong with my code?
public static async Task UploadFileAsync(Token AuthToken, StorageFile file, DriveFile objFolder)
{
try
{
if (!httpClient.DefaultRequestHeaders.Contains("Authorization"))
{
httpClient.DefaultRequestHeaders.Add("Authorization", AuthToken.TokenType + " " + AuthToken.AccessToken);
}
var JsonMessage = JsonConvert.SerializeObject(objFolder);
/*JsonMessage = {"title":"c4611_sample_explain.pdf","mimeType":"application/pdf","parents":[{"id":"root","kind":"drive#fileLink"}]}*/
var JsonReqMsg = new StringContent(JsonMessage, Encoding.UTF8, "application/json");
var fileBytes = await file.ToBytesAsync();
var form = new MultipartFormDataContent();
form.Add(new ByteArrayContent(fileBytes));
form.Add(JsonReqMsg);
form.Headers.ContentType = new MediaTypeHeaderValue("multipart/related");
var UploadReq = await httpClient.PostAsync(new Uri("https://www.googleapis.com/drive/v2/files?uploadType=multipart"), form);
if (UploadReq.IsSuccessStatusCode)
{
var UploadRes = await UploadReq.Content.ReadAsStringAsync();
}
else
{
}
}
catch (Exception ex)
{
}
}
You must use https://www.googleapis.com/upload/drive/v2/files
I have a working sample here (sorry, the JSON string is hard coded):
// Multipart file upload
HttpClient client = new HttpClient();
string uriString = "https://www.googleapis.com/upload/drive/v2/files?key=<your-key>&access_token=<access-token>&uploadType=multipart";
Uri uri = new Uri(uriString);
HttpContent metadataPart = new StringContent(
"{ \"title\" : \"My File\"}",
Encoding.UTF8,
"application/json");
HttpContent mediaPart = new StringContent(
"The naughty bunny ate all the cookies.",
Encoding.UTF8,
"text/plain");
MultipartContent multipartContent = new MultipartContent();
multipartContent.Add(metadataPart);
multipartContent.Add(mediaPart);
HttpResponseMessage response = await client.PostAsync(uri, multipartContent);
string responseString = await response.Content.ReadAsStringAsync();