I am trying to use Nuget Http client library:
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, url);
request.Headers.Add("UserAgent", "Windows 8 app client");
HttpClient client = new HttpClient();
HttpResponseMessage response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
if (response.StatusCode == HttpStatusCode.OK)
return await response.Content.ReadAsStringAsync();
else
throw new Exception("Error connecting to " + url +" ! Status: " + response.StatusCode);
When I make a https request to a site that has self-signed certificate, I get 404 error. How do I set a flag to allow invalid SSL certificate in the client?
Related
I am trying to download attachments from Jira. I use /rest/api/2/attachment/{id} to get json response of the attachment. It has field "content" that is the attachment url. I use this url and construct HttpGet and execute to get response that always gives me html content asking for login. I am sending Basic Authorization in the httpGet header. Apparently this works for downloading .png files but not any other file types. I am using java spring rest to connect to Jira horizon.
Closeable httpclient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet(jira attachmenturl);
httpGet.setHeader("Authorization", "Basic <base64Credentials>);
CloseableHttpResponse response = httpclient.execute(httpGet)
The response for .txt, .jpeg, Microsoft documents is different from response that I get for .png files.
This works:
#GetMapping(value = "/getAttachment")
public String getAttachment(#RequestParam("id") String attachmentID) throws Exception {
Client client = Client.create();
WebResource webResource = client.resource(jiraBaseURLRest + "attachment/" +
attachmentID);
ClientResponse response = webResource.header("Authorization", "Basic " +
base64Creds).type("application/json")
.accept("application/json").get(ClientResponse.class);
String result = response.getEntity(String.class);
JSONObject jsonObj = new JSONObject(result);
System.out.println("JSON Object = "+jsonObj);
URL url = new URL(jsonObj.getString("content"));
Closeable httpclient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet(url.toURI());
httpGet.setHeader("Authorization", "Basic " + base64Creds);
CloseableHttpResponse response1 = ((CloseableHttpClient) httpclient).execute(httpGet);
if(response1.getStatusLine().getStatusCode() == 200)
{
HttpEntity entity = response1.getEntity();
if (entity.isStreaming())
{
System.out.println("Streaming...");
byte data[] = EntityUtils.toByteArray(entity);
FileOutputStream fout = new FileOutputStream(new File("D://pdf1.pdf"));
fout.write(data);
fout.close();
System.out.println("Done!!");
}
}
return "Success";
}
I have MVC App and webapi and both are in different projects and mvc app authenticates via webapi using token authentication. I can authenticate via webapi and get the bearer token in MVC.But when i pass the bearer token to webapi and access resources which are protected by authorize keyword , it throws unauthorized 401 response. Iam using httpclient within MVC to communicate to webapi
1) Using fiddler i can login to webapi and access the webapi resouces using bearer token and authorization working properly.
2) using console app , i can login to webapi and access the webapi resources using bearer token and httpclient works properly
3) using a different MVC project and access the webapi using httpclient gives the same unauthorized error.
using (System.Net.Http.HttpClient client = new System.Net.Http.HttpClient(handler))
{
client.BaseAddress = new Uri(url);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", BearerToken);
string json = JsonConvert.SerializeObject(requestvalue);
System.Net.Http.HttpResponseMessage response = await client.PostAsync(url, new StringContent(json, Encoding.UTF8, "application/json"));
if (response.IsSuccessStatusCode)
{
HttpContent content = response.Content;
if (content != null)
{
value = content.ReadAsAsync<T>().Result;
}
}
}
Can anyone help on this issue?
I'd recommend you to capture the HTTP request sent through the HTTP Client via Fiddler and compare it to the request that was successful.
Even though, you're setting the Authorization header on the http client, I'm not sure if it is sent in the right format required by the Web API unless I inspect the raw HTTP request
Also you can try setting the authorization header, like below.
client.DefaultRequestHeaders.Add("Authorization", "Bearer " + tokenNo);
Google RECAPTCHA always returning error missing-input-response in the response when I try to check the correctness. How does the call to the service go, to the URL https://www.google.com/recaptcha/api/siteverify ?
The format is:
https://…/api/siteverify?secret=[…]&response=[…]&remote_ip=[…]
Make sure that Content-Type is set to application/x-www-form-urlencoded
.Net example
using (HttpClient httpClient = new HttpClient())
{
var response = await httpClient.PostAsync(GoogleVerificationUrl + "?secret=" + ReCaptchaSecretKey + "&response=" + ReCaptchaResponse, new StringContent("", Encoding.UTF8, "application/x-www-form-urlencoded"));
}
I cannot seem to connect to a https client using the Xamarin httpclient
I have tried various methods but the same error message always get returned
{System.Net.WebException: Error: SendFailure (Error writing headers) ---> System.Net.WebException: Error writing headers ---> System.IO.IOException: The authentication or decryption has failed.
Has anyone found a solution to this
Http Code:
HttpClient client = new HttpClient(new NativeMessageHandler());
client.BaseAddress = new System.Uri("https://....");
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
var request = new HttpRequestMessage(HttpMethod.Post, "https://....");
var response = await client.SendAsync(request).ConfigureAwait(false);
var json = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
I wrote the following code in Xamarin to connect the Web Server:
var request = WebRequest.Create( "http://srv21.n-software.de/authentication.json") as HttpWebRequest;
// request.Method = "GET";
request.Method = "POST";
request.Headers.Add("name", "demo");
request.Headers.Add("password", "demo");
request.ContentType = "application/x-www-form-urlencoded";
HttpWebResponse Httpresponse = (HttpWebResponse)request.GetResponse();
It connects to the web server and the web server gets the request for "authentication.json", but doesn't get the parameters of the header ("name" and "password").
What is wrong with my code?
Most likely your parameters need to be in the body of the POST request instead of in the headers. Alternatively you might try to use a GET request instead and provide the parameters through the URL, if your server supports it (i.e. http://srv21.n-software.de/authentication.json?name=demo&password=demo).
This worked for me
using System.Net.Http;
string URL = "http://www.here.com/api/postForm.php";
string DIRECT_POST_CONTENT_TYPE = "application/x-www-form-urlencoded";
HttpClient client = new HttpClient();
string postData = "username=usernameValueHere&password=passwordValueHere");
StringContent content = new StringContent(postData, Encoding.UTF8, DIRECT_POST_CONTENT_TYPE);
HttpResponseMessage response = await client.PostAsync(DIRECT_GATEWAY_URL, content);
string result = await response.Content.ReadAsStringAsync();