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using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Threading.Tasks;

namespace Https

{

public class Program

{

static IEnumerable<Content> ParseContents(IEnumerable<string> args)

{

foreach (var arg in args)

{

if (Content.TryParse(arg, out var content))

{

yield return content;

}

void Version()

{

var stream = _stdout();

var writer = new StreamWriter(stream) { AutoFlush = true };

writer.Write("dotnet-https ");

writer.WriteLine(typeof(Program).Assembly.GetName().Version);

writer.Flush();

}

void Help()

{

var stream = _stdout();

var writer = new StreamWriter(stream) { AutoFlush = true };

writer.WriteLine("Usage: https <METHOD> <URI> [options] [content]");

writer.WriteLine("");

writer.WriteLine("Submits HTTP requests. For example https put httpbin.org/put hello=world");

writer.WriteLine("");

writer.WriteLine("Arguments:");

writer.WriteLine(" <METHOD> HTTP method, i.e., get, head, post");

writer.WriteLine(" <URI> URI to send the request to. Leaving the protocol off the URI defaults to https://");

writer.WriteLine("");

writer.WriteLine("Options:");

foreach (var option in Options.GetOptionHelp())

{

writer.Write(" ");

writer.WriteLine(option);

}

writer.WriteLine("");

writer.WriteLine("Content:");

writer.WriteLine("Repeat as many content arguments to create content sent with the HTTP request. Alternatively pipe raw content send as the HTTP request content.");

writer.WriteLine(" <KEY>=<VALUE>");

writer.WriteLine("");

writer.WriteLine("Headers:");

writer.WriteLine("Repeat as many header arguments to assign headers for the HTTP request.");

writer.WriteLine(" <KEY>:<VALUE>");

writer.WriteLine("");

writer.Flush();

}

static void AddHeaders(HttpRequestMessage request, IEnumerable<Content> contents)

{

foreach (var content in contents)

{

if (!request.Headers.TryAddWithoutValidation(content.Property, content.Value))

{

if (!request.Content.Headers.TryAddWithoutValidation(content.Property, content.Value))

{

Console.Error.Write("Unexpected header: ");

Console.Error.WriteLine(content.Property);

}

readonly Func<Stream> _stderr;

readonly Func<Stream> _stdin;

readonly Func<Stream> _stdout;

readonly bool _useStdin;

public Program()

: this(Console.OpenStandardError, Console.OpenStandardInput, Console.OpenStandardOutput, Console.IsInputRedirected)

{

}

public Program(Func<Stream> stderr, Func<Stream> stdin, Func<Stream> stdout, bool useStdin)

{

_stderr = stderr;

_stdin = stdin;

_stdout = stdout;

_useStdin = useStdin;

}

public static Task<int> Main(string[] args) =>

new Program().RunAsync(args);

int HandleOptionsOnly(string[] args)

{

var options = Options.Parse(args);

if (options.Help)

{

Help();

return 0;

}

else if(options.Version)

{

Version();

return 0;

}

Help();

return 1;

}

public async Task<int> RunAsync(string[] args)

{

if (!args.Any())

{

Help();

return 1;

}

var command = default(Command);

if (args.Length > 1)

{

if (!Command.TryParse(args[0], args[1], out command))

{

if (!Command.TryParse(args[0], out command))

{

return HandleOptionsOnly(args);

}

else if (!Command.TryParse(args[0], out command))

{

return HandleOptionsOnly(args);

}

var optionArgs = args.Skip(2).TakeWhile(x => x.Length > 0 && x[0] == '-');

var options = Options.Parse(optionArgs);

if (options.Help)

{

Help();

return 0;

}

else if (options.Version)

{

Version();

return 0;

}

var contentArgs = args.Skip(2).SkipWhile(x => x.Length > 0 && x[0] == '-');

var stderr = _stderr();

var stderrWriter = new StreamWriter(stderr) { AutoFlush = true };

var stdout = _stdout();

var stdoutWriter = new StreamWriter(stdout) { AutoFlush = true };

{

var renderer = new Renderer(stdoutWriter, stderrWriter);

var http = CreateHttpClient(options);

var request = new HttpRequestMessage(

command.Method ?? HttpMethod.Get,

command.Uri

);

if (_useStdin)

{

var stream = _stdin();

request.Content = new StreamContent(stream);

}

var groups = ParseContents(contentArgs)

.GroupBy(content => content.ContentLocation)

.OrderBy(group => group.Key);

foreach (var group in groups)

{

switch (group.Key)

{

case ContentLocation.Body:

request.Content = RequestContentFormatter.As(options.RequestContentType, group, options.XmlRootName);

break;

case ContentLocation.Header:

AddHeaders(request, group);

break;

}

if (!request.Headers.UserAgent.Any())

{

request.Headers.UserAgent.Add(

new ProductInfoHeaderValue(

"dotnet-https",

typeof(Program).Assembly.GetName().Version.ToString()

)

);

}

try

{

var response = await http.SendAsync(request);

await renderer.WriteResponse(response);

}

catch (TaskCanceledException ex)

{

renderer.WriteException(ex);

return 1;

}

catch (OperationCanceledException ex)

{

renderer.WriteException(ex);

return 1;

}

catch (HttpRequestException ex)

{

renderer.WriteException(ex);

return 1;

}

stderrWriter.Flush();

stdoutWriter.Flush();

return 0;

}

static HttpClient CreateHttpClient(Options options)

{

var http = default(HttpClient);

if (options.RequiresHandler)

{

var handler = new HttpClientHandler();

if (options.IgnoreCertificate)

{

handler.ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;

}

if (options.StopAutoRedirects)

{

handler.AllowAutoRedirect = false;

}

http = new HttpClient(handler);

}

else

{

http = new HttpClient();

}

if (options.Timeout.HasValue)

{

http.Timeout = options.Timeout.Value;

}

return http;

}