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Using GRPC only connecting to dialog flow StreamingDetectIntent, stuck at await responseStream.MoveNext

I'm trying to use DialogFlow API v2 with Unity.
Since there's no official SDK for Unity yet I used the Grpc beta unity SDK and the generated C# code I created with Protobuf and protoc from Grpc tools
The Grpc beta unity sdk is hidden in this link.
https://packages.grpc.io/ just click a build ID and you will find a built unity package.
I imported Google.Apis.Auth.OAuth2 and Grpc.Auth which weren't included in the official Grpc unity beta sdk.
Then I wrote this code which seems to work fine except that await responseStream.MoveNext() is stuck.
I believe the main reason is I'm not sure where to set the path to the end point which is '/v2/projects/project-id/agent/intents'
GoogleCredential credential = GoogleCredential.FromJson(privateKey);
Grpc.Core.Channel channel = new Grpc.Core.Channel("dialogflow.googleapis.com", credential.ToChannelCredentials());
var client = new SessionsClient(channel);
CallOptions options = new CallOptions();
var duplexStream = client.StreamingDetectIntent();
var responseHandlerTask = System.Threading.Tasks.Task.Run(async () =>
{
IAsyncEnumerator<StreamingDetectIntentResponse> responseStream = duplexStream.ResponseStream;
while (await responseStream.MoveNext())//stuck here
{
StreamingDetectIntentResponse response = responseStream.Current;
}
// The response stream has completed
});
// Send requests to the server
bool done = false;
while (!done)
{
// Initialize a request
var queryInput = new QueryInput();
queryInput.AudioConfig = new InputAudioConfig();
queryInput.AudioConfig.LanguageCode = "ja";
queryInput.AudioConfig.SampleRateHertz = 141000;
queryInput.AudioConfig.AudioEncoding = AudioEncoding.Linear16;
StreamingDetectIntentRequest request = new StreamingDetectIntentRequest
{
Session = "",
QueryInput = queryInput,
};
var bytes = File.ReadAllBytes("test.wav");
request.InputAudio = Google.Protobuf.ByteString.CopyFrom(bytes);
try
{
await duplexStream.RequestStream.WriteAsync(request);
}
catch (System.Exception e)
{
context.Post(state =>
{
Debug.LogErrorFormat("{0}\n{1}\n{2}\n{3}", e.Message, e.HelpLink, e.Source, e.StackTrace);
}, null);
}
done = true;
}
await duplexStream.RequestStream.CompleteAsync();
await responseHandlerTask;
Thanks for advance.

I didn't add correction session to the request. The following fixed it.
StreamingDetectIntentRequest request = new StreamingDetectIntentRequest
{
Session = "projects/project-id/agent/sessions/sessionid",
QueryInput = queryInput,
};

C# - how to do multiple web requests at the same time

I wrote a code to check urls, however, ir works really slow.. I want to try to make it work on few urls at the same time, for example 10 urls or at least make it as fast as possible.
my Code:
Parallel.ForEach(urls, new ParallelOptions {
MaxDegreeOfParallelism = 10
}, s => {
try {
using(HttpRequest httpRequest = new HttpRequest()) {
httpRequest.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0";
httpRequest.Cookies = new CookieDictionary(false);
httpRequest.ConnectTimeout = 10000;
httpRequest.ReadWriteTimeout = 10000;
httpRequest.KeepAlive = true;
httpRequest.IgnoreProtocolErrors = true;
string check = httpRequest.Get(s + "'", null).ToString();
if (errors.Any(new Func < string, bool > (check.Contains))) {
Valid.Add(s);
Console.WriteLine(s);
File.WriteAllLines(Environment.CurrentDirectory + "/Good.txt", Valid);
}
}
} catch {
}
});

It is unlikely that your service calls are CPU-bound. So spinning up more threads to handle the load is maybe not the best approach-- you will get better throughput if you use async and await instead, if you can, using the more modern HttpClient instead of HttpRequest or HttpWebRequest.
Here is an example of how to do it:
var client = new HttpClient();
//Start with a list of URLs
var urls = new string[]
{
"http://www.google.com",
"http://www.bing.com"
};
//Start requests for all of them
var requests = urls.Select
(
url => client.GetAsync(url)
).ToList();
//Wait for all the requests to finish
await Task.WhenAll(requests);
//Get the responses
var responses = requests.Select
(
task => task.Result
);
foreach (var r in responses)
{
// Extract the message body
var s = await r.Content.ReadAsStringAsync();
Console.WriteLine(s);
}

Try doing as below.
Parallel.ForEach(urls, new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount - 1 }
At least it makes sure that all the cores are used by leaving 1 so that your machine will not run out of memory.
Also, consider #KSib comment.

website parsing - webbrowser or httpwebresponse

I experienced some difficulties when I tried to parse some data out of my banking website. Basically, I would like to export my transaction history in a daily bases automatically, but the internet banking does not have any automated functionality as such.
I am currently experimenting on how to simulate filling up form and clicks to get to the download page and get the CSV file where I can use for parsing.
I have tried different method and have no success, please direct me to the correct path.
public static void getNABLogin()
{
try
{
Console.WriteLine("ENTER to begin");
//Console.ReadLine();
System.Net.HttpWebRequest wr = (System.Net.HttpWebRequest)System.Net.WebRequest.Create("https://ib.nab.com.au/nabib/index.jsp");
wr.Timeout = 1000;
wr.Method = "GET";
wr.UserAgent = "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36";
wr.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
wr.Headers.Add("Accept-Language", "en-GB,en-US;q=0.8,en;q=0.6");
wr.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
//wr.Connection = "Keep-Alive";
wr.Host = "ib.nab.com.au";
wr.KeepAlive = true;
wr.CookieContainer = new CookieContainer();
//////////This part will get me to the correct login page at least////////////////////
// System.IO.Stream objStreamReceive ;
// System.Text.Encoding objEncoding;
// System.IO.StreamReader objStreamRead;
// WebResponse objResponse;
//string strOutput = string.Empty;
//objResponse = wr.GetResponse();
//objStreamReceive = objResponse.GetResponseStream();
//objEncoding = System.Text.Encoding.GetEncoding("utf-8");
//objStreamRead = new StreamReader(objStreamReceive, objEncoding); // Set function return value
//strOutput = objStreamRead.ReadToEnd();
///////////////////////////////
System.Net.HttpWebResponse wresp = (System.Net.HttpWebResponse)wr.GetResponse();
System.Windows.Forms.WebBrowser wb = new System.Windows.Forms.WebBrowser();
wb.DocumentStream = wresp.GetResponseStream();
wb.ScriptErrorsSuppressed = true;
wb.DocumentCompleted += (sndr, e) =>
{
/////////////After dumping the document text into a text file, I get a different page/////////////////
//////////////I get the normal website instead of login page////////////////////////
System.IO.StreamWriter file = new System.IO.StreamWriter("C:\\temp\\test.txt");
Console.WriteLine(wb.DocumentText);
file.WriteLine(wb.DocumentText);
System.Windows.Forms.HtmlDocument d = wb.Document;
System.Windows.Forms.HtmlElementCollection ctrlCol = d.GetElementsByTagName("script");
foreach (System.Windows.Forms.HtmlElement tag in ctrlCol)
{
tag.SetAttribute("src", string.Format("https://ib.nab.com.au{0}", tag.GetAttribute("src")));
}
ctrlCol = d.GetElementsByTagName("input");
foreach (System.Windows.Forms.HtmlElement tag in ctrlCol)
{
if (tag.GetAttribute("name") == "userid")
{
tag.SetAttribute("value", "123456");
}
else if (tag.GetAttribute("name") == "password")
{
tag.SetAttribute("value", "nabPassword");
}
file.WriteLine(tag.GetAttribute("name"));
}
file.Close();
// object y = wb.Document.InvokeScript("validateLogin");
};
while (wb.ReadyState != System.Windows.Forms.WebBrowserReadyState.Complete)
{
System.Windows.Forms.Application.DoEvents();
}
}
catch(Exception e)
{
System.IO.StreamWriter file = new System.IO.StreamWriter("C:\\temp\\error.txt");
file.WriteLine(e.Message);
Console.WriteLine(string.Format("error: {0}", e.Message));
Console.ReadLine();
}
I called this method from a thread (as you have probably know that webbrowser need to be STA thread to work).
As explained in the code, I got the the login page correctly using httpwebresponse method. but when I tried to load to webbrowser using documentstream, I got to a different website.
Next question would be, what should I do next after I got to the login page, how can I simulate clicks and filling in data (my theory at the moment is trying to post some data using httpwebrequest).
Please shed some light on this. any comments or information is very much appreciated.
Thank you very much in advance.

You can use selenium like browser and go to where you want to go and parse page with HtmlAgilityPack. Both has a c# support. Very simple console application can do rest
Selenium
http://www.seleniumhq.org/docs/02_selenium_ide.jsp#chapter02-reference
HtmlAgilityPack
https://htmlagilitypack.codeplex.com/wikipage?title=Examples
You can fill form and post like this with selenium and c#
//Navigate to the site
driver.Navigate().GoToUrl("http://www.google.com.au");
// Find the text input element by its name
IWebElement query = driver.FindElement(By.Name("q"));
// Enter something to search for
query.SendKeys("Selenium");
// Now submit the form
query.Submit();
// Google's search is rendered dynamically with JavaScript.
// Wait for the page to load, timeout after 5 seconds
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(5));
wait.Until((d) => { return d.Title.StartsWith("selenium"); });
And you can parse data (this example table) like this with HtmlAgility
var cols = doc.DocumentNode.SelectNodes("//table[#id='table2']//tr//td");
for (int ii = 0; ii < cols.Count; ii=ii+2)
{
string name = cols[ii].InnerText.Trim();
int age = int.Parse(cols[ii+1].InnerText.Split(' ')[1]);
}

Convert curl sample to c#.net [duplicate]

I want to make the following curl call in my C# console application:
curl -d "text=This is a block of text" \
http://api.repustate.com/v2/demokey/score.json
I tried to do like the question posted here, but I cannot fill the properties properly.
I also tried to convert it to a regular HTTP request:
http://api.repustate.com/v2/demokey/score.json?text="This%20is%20a%20block%20of%20text"
Can I convert a cURL call to an HTTP request? If so, how? If not, how can I make the above cURL call from my C# console application properly?

Well, you wouldn't call cURL directly, rather, you'd use one of the following options:
HttpWebRequest/HttpWebResponse
WebClient
HttpClient (available from .NET 4.5 on)
I'd highly recommend using the HttpClient class, as it's engineered to be much better (from a usability standpoint) than the former two.
In your case, you would do this:
using System.Net.Http;
var client = new HttpClient();
// Create the HttpContent for the form to be posted.
var requestContent = new FormUrlEncodedContent(new [] {
new KeyValuePair<string, string>("text", "This is a block of text"),
});
// Get the response.
HttpResponseMessage response = await client.PostAsync(
"http://api.repustate.com/v2/demokey/score.json",
requestContent);
// Get the response content.
HttpContent responseContent = response.Content;
// Get the stream of the content.
using (var reader = new StreamReader(await responseContent.ReadAsStreamAsync()))
{
// Write the output.
Console.WriteLine(await reader.ReadToEndAsync());
}
Also note that the HttpClient class has much better support for handling different response types, and better support for asynchronous operations (and the cancellation of them) over the previously mentioned options.

Or in restSharp:
var client = new RestClient("https://example.com/?urlparam=true");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddHeader("cache-control", "no-cache");
request.AddHeader("header1", "headerval");
request.AddParameter("application/x-www-form-urlencoded", "bodykey=bodyval", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

Below is a working example code.
Please note you need to add a reference to Newtonsoft.Json.Linq
string url = "https://yourAPIurl";
WebRequest myReq = WebRequest.Create(url);
string credentials = "xxxxxxxxxxxxxxxxxxxxxxxx:yyyyyyyyyyyyyyyyyyyyyyyyyyyyyy";
CredentialCache mycache = new CredentialCache();
myReq.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.ASCII.GetBytes(credentials));
WebResponse wr = myReq.GetResponse();
Stream receiveStream = wr.GetResponseStream();
StreamReader reader = new StreamReader(receiveStream, Encoding.UTF8);
string content = reader.ReadToEnd();
Console.WriteLine(content);
var json = "[" + content + "]"; // change this to array
var objects = JArray.Parse(json); // parse as array
foreach (JObject o in objects.Children<JObject>())
{
foreach (JProperty p in o.Properties())
{
string name = p.Name;
string value = p.Value.ToString();
Console.Write(name + ": " + value);
}
}
Console.ReadLine();
Reference: TheDeveloperBlog.com

Late response but this is what I ended up doing. If you want to run your curl commands very similarly as you run them on linux and you have windows 10 or latter do this:
public static string ExecuteCurl(string curlCommand, int timeoutInSeconds=60)
{
if (string.IsNullOrEmpty(curlCommand))
return "";
curlCommand = curlCommand.Trim();
// remove the curl keworkd
if (curlCommand.StartsWith("curl"))
{
curlCommand = curlCommand.Substring("curl".Length).Trim();
}
// this code only works on windows 10 or higher
{
curlCommand = curlCommand.Replace("--compressed", "");
// windows 10 should contain this file
var fullPath = System.IO.Path.Combine(Environment.SystemDirectory, "curl.exe");
if (System.IO.File.Exists(fullPath) == false)
{
if (Debugger.IsAttached) { Debugger.Break(); }
throw new Exception("Windows 10 or higher is required to run this application");
}
// on windows ' are not supported. For example: curl 'http://ublux.com' does not work and it needs to be replaced to curl "http://ublux.com"
List<string> parameters = new List<string>();
// separate parameters to escape quotes
try
{
Queue<char> q = new Queue<char>();
foreach (var c in curlCommand.ToCharArray())
{
q.Enqueue(c);
}
StringBuilder currentParameter = new StringBuilder();
void insertParameter()
{
var temp = currentParameter.ToString().Trim();
if (string.IsNullOrEmpty(temp) == false)
{
parameters.Add(temp);
}
currentParameter.Clear();
}
while (true)
{
if (q.Count == 0)
{
insertParameter();
break;
}
char x = q.Dequeue();
if (x == '\'')
{
insertParameter();
// add until we find last '
while (true)
{
x = q.Dequeue();
// if next 2 characetrs are \'
if (x == '\\' && q.Count > 0 && q.Peek() == '\'')
{
currentParameter.Append('\'');
q.Dequeue();
continue;
}
if (x == '\'')
{
insertParameter();
break;
}
currentParameter.Append(x);
}
}
else if (x == '"')
{
insertParameter();
// add until we find last "
while (true)
{
x = q.Dequeue();
// if next 2 characetrs are \"
if (x == '\\' && q.Count > 0 && q.Peek() == '"')
{
currentParameter.Append('"');
q.Dequeue();
continue;
}
if (x == '"')
{
insertParameter();
break;
}
currentParameter.Append(x);
}
}
else
{
currentParameter.Append(x);
}
}
}
catch
{
if (Debugger.IsAttached) { Debugger.Break(); }
throw new Exception("Invalid curl command");
}
StringBuilder finalCommand = new StringBuilder();
foreach (var p in parameters)
{
if (p.StartsWith("-"))
{
finalCommand.Append(p);
finalCommand.Append(" ");
continue;
}
var temp = p;
if (temp.Contains("\""))
{
temp = temp.Replace("\"", "\\\"");
}
if (temp.Contains("'"))
{
temp = temp.Replace("'", "\\'");
}
finalCommand.Append($"\"{temp}\"");
finalCommand.Append(" ");
}
using (var proc = new Process
{
StartInfo = new ProcessStartInfo
{
FileName = "curl.exe",
Arguments = finalCommand.ToString(),
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true,
WorkingDirectory = Environment.SystemDirectory
}
})
{
proc.Start();
proc.WaitForExit(timeoutInSeconds*1000);
return proc.StandardOutput.ReadToEnd();
}
}
}
The reason why the code is a little bit long is because windows will give you an error if you execute a single quote. In other words, the command curl 'https://google.com' will work on linux and it will not work on windows. Thanks to that method I created you can use single quotes and run your curl commands exactly as you run them on linux. This code also checks for escaping characters such as \' and \".
For example use this code as
var output = ExecuteCurl(#"curl 'https://google.com' -H 'Accept: application/json, text/javascript, */*; q=0.01'");
If you where to run that same string agains C:\Windows\System32\curl.exe it will not work because for some reason windows does not like single quotes.

I know this is a very old question but I post this solution in case it helps somebody. I recently met this problem and google led me here. The answer here helps me to understand the problem but there are still issues due to my parameter combination. What eventually solves my problem is curl to C# converter. It is a very powerful tool and supports most of the parameters for Curl. The code it generates is almost immediately runnable.

Don't forget to add System.Net.Http, specially if you receive this error:
Severity Code Description Project File Line Suppression State
Error CS0246 The type or namespace name 'HttpClient' could not be
found (are you missing a using directive or an assembly
reference?) 1_default.aspx D:\Projetos\Testes\FacebookAPI\FB-CustomAudience\default.aspx.cs 56 Active
In this case you shoud:
Add System.Net.Http from Nuget: Tools / NuGet Package Manager / Manager NuGet Packages for Solution;
Search for System.Net.Http
Add in the top of your page the follow code:
using System.Net.Http;

Call cURL from your console app is not a good idea.
But you can use TinyRestClient which make easier to build requests :
var client = new TinyRestClient(new HttpClient(),"https://api.repustate.com/");
client.PostRequest("v2/demokey/score.json").
AddQueryParameter("text", "").
ExecuteAsync<MyResponse>();

Well if you are new to C# with cmd-line exp. you can use online sites like "https://curl.olsh.me/" or search curl to C# converter will returns site that could do that for you.
or if you are using postman you can use Generate Code Snippet only problem with Postman code generator is the dependency on RestSharp library.

Making a cURL call in C#

I want to make the following curl call in my C# console application:
curl -d "text=This is a block of text" \
http://api.repustate.com/v2/demokey/score.json
I tried to do like the question posted here, but I cannot fill the properties properly.
I also tried to convert it to a regular HTTP request:
http://api.repustate.com/v2/demokey/score.json?text="This%20is%20a%20block%20of%20text"
Can I convert a cURL call to an HTTP request? If so, how? If not, how can I make the above cURL call from my C# console application properly?

Well, you wouldn't call cURL directly, rather, you'd use one of the following options:
HttpWebRequest/HttpWebResponse
WebClient
HttpClient (available from .NET 4.5 on)
I'd highly recommend using the HttpClient class, as it's engineered to be much better (from a usability standpoint) than the former two.
In your case, you would do this:
using System.Net.Http;
var client = new HttpClient();
// Create the HttpContent for the form to be posted.
var requestContent = new FormUrlEncodedContent(new [] {
new KeyValuePair<string, string>("text", "This is a block of text"),
});
// Get the response.
HttpResponseMessage response = await client.PostAsync(
"http://api.repustate.com/v2/demokey/score.json",
requestContent);
// Get the response content.
HttpContent responseContent = response.Content;
// Get the stream of the content.
using (var reader = new StreamReader(await responseContent.ReadAsStreamAsync()))
{
// Write the output.
Console.WriteLine(await reader.ReadToEndAsync());
}
Also note that the HttpClient class has much better support for handling different response types, and better support for asynchronous operations (and the cancellation of them) over the previously mentioned options.

Or in restSharp:
var client = new RestClient("https://example.com/?urlparam=true");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddHeader("cache-control", "no-cache");
request.AddHeader("header1", "headerval");
request.AddParameter("application/x-www-form-urlencoded", "bodykey=bodyval", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

Below is a working example code.
Please note you need to add a reference to Newtonsoft.Json.Linq
string url = "https://yourAPIurl";
WebRequest myReq = WebRequest.Create(url);
string credentials = "xxxxxxxxxxxxxxxxxxxxxxxx:yyyyyyyyyyyyyyyyyyyyyyyyyyyyyy";
CredentialCache mycache = new CredentialCache();
myReq.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.ASCII.GetBytes(credentials));
WebResponse wr = myReq.GetResponse();
Stream receiveStream = wr.GetResponseStream();
StreamReader reader = new StreamReader(receiveStream, Encoding.UTF8);
string content = reader.ReadToEnd();
Console.WriteLine(content);
var json = "[" + content + "]"; // change this to array
var objects = JArray.Parse(json); // parse as array
foreach (JObject o in objects.Children<JObject>())
{
foreach (JProperty p in o.Properties())
{
string name = p.Name;
string value = p.Value.ToString();
Console.Write(name + ": " + value);
}
}
Console.ReadLine();
Reference: TheDeveloperBlog.com

Late response but this is what I ended up doing. If you want to run your curl commands very similarly as you run them on linux and you have windows 10 or latter do this:
public static string ExecuteCurl(string curlCommand, int timeoutInSeconds=60)
{
if (string.IsNullOrEmpty(curlCommand))
return "";
curlCommand = curlCommand.Trim();
// remove the curl keworkd
if (curlCommand.StartsWith("curl"))
{
curlCommand = curlCommand.Substring("curl".Length).Trim();
}
// this code only works on windows 10 or higher
{
curlCommand = curlCommand.Replace("--compressed", "");
// windows 10 should contain this file
var fullPath = System.IO.Path.Combine(Environment.SystemDirectory, "curl.exe");
if (System.IO.File.Exists(fullPath) == false)
{
if (Debugger.IsAttached) { Debugger.Break(); }
throw new Exception("Windows 10 or higher is required to run this application");
}
// on windows ' are not supported. For example: curl 'http://ublux.com' does not work and it needs to be replaced to curl "http://ublux.com"
List<string> parameters = new List<string>();
// separate parameters to escape quotes
try
{
Queue<char> q = new Queue<char>();
foreach (var c in curlCommand.ToCharArray())
{
q.Enqueue(c);
}
StringBuilder currentParameter = new StringBuilder();
void insertParameter()
{
var temp = currentParameter.ToString().Trim();
if (string.IsNullOrEmpty(temp) == false)
{
parameters.Add(temp);
}
currentParameter.Clear();
}
while (true)
{
if (q.Count == 0)
{
insertParameter();
break;
}
char x = q.Dequeue();
if (x == '\'')
{
insertParameter();
// add until we find last '
while (true)
{
x = q.Dequeue();
// if next 2 characetrs are \'
if (x == '\\' && q.Count > 0 && q.Peek() == '\'')
{
currentParameter.Append('\'');
q.Dequeue();
continue;
}
if (x == '\'')
{
insertParameter();
break;
}
currentParameter.Append(x);
}
}
else if (x == '"')
{
insertParameter();
// add until we find last "
while (true)
{
x = q.Dequeue();
// if next 2 characetrs are \"
if (x == '\\' && q.Count > 0 && q.Peek() == '"')
{
currentParameter.Append('"');
q.Dequeue();
continue;
}
if (x == '"')
{
insertParameter();
break;
}
currentParameter.Append(x);
}
}
else
{
currentParameter.Append(x);
}
}
}
catch
{
if (Debugger.IsAttached) { Debugger.Break(); }
throw new Exception("Invalid curl command");
}
StringBuilder finalCommand = new StringBuilder();
foreach (var p in parameters)
{
if (p.StartsWith("-"))
{
finalCommand.Append(p);
finalCommand.Append(" ");
continue;
}
var temp = p;
if (temp.Contains("\""))
{
temp = temp.Replace("\"", "\\\"");
}
if (temp.Contains("'"))
{
temp = temp.Replace("'", "\\'");
}
finalCommand.Append($"\"{temp}\"");
finalCommand.Append(" ");
}
using (var proc = new Process
{
StartInfo = new ProcessStartInfo
{
FileName = "curl.exe",
Arguments = finalCommand.ToString(),
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true,
WorkingDirectory = Environment.SystemDirectory
}
})
{
proc.Start();
proc.WaitForExit(timeoutInSeconds*1000);
return proc.StandardOutput.ReadToEnd();
}
}
}
The reason why the code is a little bit long is because windows will give you an error if you execute a single quote. In other words, the command curl 'https://google.com' will work on linux and it will not work on windows. Thanks to that method I created you can use single quotes and run your curl commands exactly as you run them on linux. This code also checks for escaping characters such as \' and \".
For example use this code as
var output = ExecuteCurl(#"curl 'https://google.com' -H 'Accept: application/json, text/javascript, */*; q=0.01'");
If you where to run that same string agains C:\Windows\System32\curl.exe it will not work because for some reason windows does not like single quotes.

I know this is a very old question but I post this solution in case it helps somebody. I recently met this problem and google led me here. The answer here helps me to understand the problem but there are still issues due to my parameter combination. What eventually solves my problem is curl to C# converter. It is a very powerful tool and supports most of the parameters for Curl. The code it generates is almost immediately runnable.

Don't forget to add System.Net.Http, specially if you receive this error:
Severity Code Description Project File Line Suppression State
Error CS0246 The type or namespace name 'HttpClient' could not be
found (are you missing a using directive or an assembly
reference?) 1_default.aspx D:\Projetos\Testes\FacebookAPI\FB-CustomAudience\default.aspx.cs 56 Active
In this case you shoud:
Add System.Net.Http from Nuget: Tools / NuGet Package Manager / Manager NuGet Packages for Solution;
Search for System.Net.Http
Add in the top of your page the follow code:
using System.Net.Http;

Call cURL from your console app is not a good idea.
But you can use TinyRestClient which make easier to build requests :
var client = new TinyRestClient(new HttpClient(),"https://api.repustate.com/");
client.PostRequest("v2/demokey/score.json").
AddQueryParameter("text", "").
ExecuteAsync<MyResponse>();

Well if you are new to C# with cmd-line exp. you can use online sites like "https://curl.olsh.me/" or search curl to C# converter will returns site that could do that for you.
or if you are using postman you can use Generate Code Snippet only problem with Postman code generator is the dependency on RestSharp library.