// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using System;
using System.Linq;
using System.Reflection;
using System.Collections.Generic;
using System.Text;

namespace UnityEngine.Networking
{
 // This file extends UnityWebRequest's public API with convenient wrappers
 // for common operations.
 public partial class UnityWebRequest
 {
 public static UnityWebRequest Get(string uri)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbGET, new DownloadHandlerBuffer(), null);
 return request;
 }

 public static UnityWebRequest Get(Uri uri)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbGET, new DownloadHandlerBuffer(), null);
 return request;
 }

 public static UnityWebRequest Delete(string uri)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbDELETE);
 return request;
 }

 public static UnityWebRequest Delete(Uri uri)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbDELETE);
 return request;
 }

 public static UnityWebRequest Head(string uri)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbHEAD);
 return request;
 }

 public static UnityWebRequest Head(Uri uri)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbHEAD);
 return request;
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetTexture is obsolete. Use UnityWebRequestTexture.GetTexture instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestTexture.GetTexture(*)", true)]
 public static UnityWebRequest GetTexture(string uri)
 {
 throw new NotSupportedException("UnityWebRequest.GetTexture is obsolete. Use UnityWebRequestTexture.GetTexture instead.");
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetTexture is obsolete. Use UnityWebRequestTexture.GetTexture instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestTexture.GetTexture(*)", true)]
 public static UnityWebRequest GetTexture(string uri, bool nonReadable)
 {
 throw new NotSupportedException("UnityWebRequest.GetTexture is obsolete. Use UnityWebRequestTexture.GetTexture instead.");
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetAudioClip is obsolete. Use UnityWebRequestMultimedia.GetAudioClip instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestMultimedia.GetAudioClip(*)", true)]
 public static UnityWebRequest GetAudioClip(string uri, AudioType audioType)
 {
 return null;
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetAssetBundle is obsolete. Use UnityWebRequestAssetBundle.GetAssetBundle instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestAssetBundle.GetAssetBundle(*)", true)]
 public static UnityWebRequest GetAssetBundle(string uri)
 {
 return null;
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetAssetBundle is obsolete. Use UnityWebRequestAssetBundle.GetAssetBundle instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestAssetBundle.GetAssetBundle(*)", true)]
 public static UnityWebRequest GetAssetBundle(string uri, uint crc)
 {
 return null;
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetAssetBundle is obsolete. Use UnityWebRequestAssetBundle.GetAssetBundle instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestAssetBundle.GetAssetBundle(*)", true)]
 public static UnityWebRequest GetAssetBundle(string uri, uint version, uint crc)
 {
 return null;
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetAssetBundle is obsolete. Use UnityWebRequestAssetBundle.GetAssetBundle instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestAssetBundle.GetAssetBundle(*)", true)]
 public static UnityWebRequest GetAssetBundle(string uri, Hash128 hash, uint crc)
 {
 return null;
 }

 [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
 [Obsolete("UnityWebRequest.GetAssetBundle is obsolete. Use UnityWebRequestAssetBundle.GetAssetBundle instead (UnityUpgradable) -> [UnityEngine] UnityWebRequestAssetBundle.GetAssetBundle(*)", true)]
 public static UnityWebRequest GetAssetBundle(string uri, CachedAssetBundle cachedAssetBundle, uint crc)
 {
 return null;
 }

 public static UnityWebRequest Put(string uri, byte[] bodyData)
 {
 UnityWebRequest request = new UnityWebRequest(
 uri,
 kHttpVerbPUT,
 new DownloadHandlerBuffer(),
 new UploadHandlerRaw(bodyData)
 );

 return request;
 }

 public static UnityWebRequest Put(Uri uri, byte[] bodyData)
 {
 UnityWebRequest request = new UnityWebRequest(
 uri,
 kHttpVerbPUT,
 new DownloadHandlerBuffer(),
 new UploadHandlerRaw(bodyData)
 );

 return request;
 }

 public static UnityWebRequest Put(string uri, string bodyData)
 {
 UnityWebRequest request = new UnityWebRequest(
 uri,
 kHttpVerbPUT,
 new DownloadHandlerBuffer(),
 new UploadHandlerRaw(System.Text.Encoding.UTF8.GetBytes(bodyData))
 );

 return request;
 }

 public static UnityWebRequest Put(Uri uri, string bodyData)
 {
 UnityWebRequest request = new UnityWebRequest(
 uri,
 kHttpVerbPUT,
 new DownloadHandlerBuffer(),
 new UploadHandlerRaw(System.Text.Encoding.UTF8.GetBytes(bodyData))
 );

 return request;
 }

 public static UnityWebRequest Post(string uri, string postData)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, postData);
 return request;
 }

 public static UnityWebRequest Post(Uri uri, string postData)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, postData);
 return request;
 }

 private static void SetupPost(UnityWebRequest request, string postData)
 {
 byte[] payload = null;
 if (!string.IsNullOrEmpty(postData))
 {
 string urlencoded = WWWTranscoder.DataEncode(postData, System.Text.Encoding.UTF8);
 payload = System.Text.Encoding.UTF8.GetBytes(urlencoded);
 }

 request.uploadHandler = new UploadHandlerRaw(payload);
 request.uploadHandler.contentType = "application/x-www-form-urlencoded";
 request.downloadHandler = new DownloadHandlerBuffer();
 }

 // Provides a shim for sending a multipart form as declared by the legacy WWWForm class.
 public static UnityWebRequest Post(string uri, WWWForm formData)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, formData);
 return request;
 }

 public static UnityWebRequest Post(Uri uri, WWWForm formData)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, formData);
 return request;
 }

 private static void SetupPost(UnityWebRequest request, WWWForm formData)
 {
 byte[] payload = null;
 if (formData != null)
 {
 payload = formData.data;
 if (payload.Length == 0)
 payload = null;
 }

 request.uploadHandler = new UploadHandlerRaw(payload);
 request.downloadHandler = new DownloadHandlerBuffer();

 // Add in appropriate Content-Type header
 if (formData != null)
 {
 Dictionary<string, string> formHeaders = formData.headers;
 foreach (KeyValuePair<string, string> header in formHeaders)
 request.SetRequestHeader(header.Key, header.Value);
 }
 }

 // Provides a way to send a multipart form using the modern IMultipartFormSection API.
 public static UnityWebRequest Post(string uri, List<IMultipartFormSection> multipartFormSections)
 {
 byte[] boundary = GenerateBoundary();
 return Post(uri, multipartFormSections, boundary);
 }

 public static UnityWebRequest Post(Uri uri, List<IMultipartFormSection> multipartFormSections)
 {
 byte[] boundary = GenerateBoundary();
 return Post(uri, multipartFormSections, boundary);
 }

 public static UnityWebRequest Post(string uri, List<IMultipartFormSection> multipartFormSections, byte[] boundary)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, multipartFormSections, boundary);
 return request;
 }

 public static UnityWebRequest Post(Uri uri, List<IMultipartFormSection> multipartFormSections, byte[] boundary)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, multipartFormSections, boundary);
 return request;
 }

 private static void SetupPost(UnityWebRequest request, List<IMultipartFormSection> multipartFormSections, byte[] boundary)
 {
 byte[] payload = null;
 if (multipartFormSections != null && multipartFormSections.Count != 0)
 payload = SerializeFormSections(multipartFormSections, boundary);

 UploadHandler uploadHandler = new UploadHandlerRaw(payload);
 uploadHandler.contentType = "multipart/form-data; boundary=" + System.Text.Encoding.UTF8.GetString(boundary, 0, boundary.Length);

 request.uploadHandler = uploadHandler;
 request.downloadHandler = new DownloadHandlerBuffer();
 }

 // Provides a way to send a simple urlencoded form body, for simple forms without file sections.
 public static UnityWebRequest Post(string uri, Dictionary<string, string> formFields)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, formFields);
 return request;
 }

 public static UnityWebRequest Post(Uri uri, Dictionary<string, string> formFields)
 {
 UnityWebRequest request = new UnityWebRequest(uri, kHttpVerbPOST);
 SetupPost(request, formFields);
 return request;
 }

 private static void SetupPost(UnityWebRequest request, Dictionary<string, string> formFields)
 {
 byte[] payload = null;
 if (formFields != null && formFields.Count != 0)
 payload = SerializeSimpleForm(formFields);

 UploadHandler formUploadHandler = new UploadHandlerRaw(payload);
 formUploadHandler.contentType = "application/x-www-form-urlencoded";

 request.uploadHandler = formUploadHandler;
 request.downloadHandler = new DownloadHandlerBuffer();
 }


 public static string EscapeURL(string s)
 {
 return EscapeURL(s, System.Text.Encoding.UTF8);
 }

 public static string EscapeURL(string s, Encoding e)
 {
 if (s == null)
 return null;

 if (s == "")
 return "";

 if (e == null)
 return null;

 var bytes = e.GetBytes(s);
 var decodedBytes = WWWTranscoder.URLEncode(bytes);
 return e.GetString(decodedBytes);
 }

 public static string UnEscapeURL(string s)
 {
 return UnEscapeURL(s, System.Text.Encoding.UTF8);
 }

 public static string UnEscapeURL(string s, Encoding e)
 {
 if (null == s)
 return null;

 if (s.IndexOf('%') == -1 && s.IndexOf('+') == -1)
 return s;

 var bytes = e.GetBytes(s);
 var decodedBytes = WWWTranscoder.URLDecode(bytes);
 return e.GetString(decodedBytes);
 }

 public static byte[] SerializeFormSections(List<IMultipartFormSection> multipartFormSections, byte[] boundary)
 {
 if (multipartFormSections == null || multipartFormSections.Count == 0)
 return null;

 byte[] crlf = System.Text.Encoding.UTF8.GetBytes("\r\n");
 byte[] dDash = WWWForm.DefaultEncoding.GetBytes("--");

 int estimatedSize = 0;
 foreach (IMultipartFormSection section in multipartFormSections)
 {
 estimatedSize += 64 + section.sectionData.Length;
 }

 List<byte> formData = new List<byte>(estimatedSize);
 foreach (IMultipartFormSection section in multipartFormSections)
 {
 string disposition = "form-data";

 string sectionName = section.sectionName;
 string fileName = section.fileName;

 string header = "Content-Disposition: " + disposition;

 if (!string.IsNullOrEmpty(sectionName))
 {
 header += "; name=\"" + sectionName + "\"";
 }

 if (!string.IsNullOrEmpty(fileName))
 {
 header += "; filename=\"" + fileName + "\"";
 }

 header += "\r\n";

 string contentType = section.contentType;
 if (!string.IsNullOrEmpty(contentType))
 {
 header += "Content-Type: " + contentType + "\r\n";
 }

 formData.AddRange(crlf);
 formData.AddRange(dDash);
 formData.AddRange(boundary);
 formData.AddRange(crlf);
 formData.AddRange(System.Text.Encoding.UTF8.GetBytes(header));
 formData.AddRange(crlf);
 formData.AddRange(section.sectionData);
 }

 // end sections with boundary delimiter (https://tools.ietf.org/html/rfc2046)
 formData.AddRange(crlf);
 formData.AddRange(dDash);
 formData.AddRange(boundary);
 formData.AddRange(dDash);
 formData.AddRange(crlf);
 return formData.ToArray();
 }

 public static byte[] GenerateBoundary()
 {
 // Generate a random boundary
 byte[] boundary = new byte[40];
 for (int i = 0; i < 40; i++)
 {
 int randomChar = Random.Range(48, 110);
 if (randomChar > 57) // skip unprintable chars between 57 and 64 (inclusive)
 randomChar += 7;
 if (randomChar > 90) // and 91 and 96 (inclusive)
 randomChar += 6;
 boundary[i] = (byte)randomChar;
 }
 return boundary;
 }

 public static byte[] SerializeSimpleForm(Dictionary<string, string> formFields)
 {
 string queryString = "";
 foreach (KeyValuePair<string, string> pair in formFields)
 {
 if (queryString.Length > 0) { queryString += "&"; }
 queryString += WWWTranscoder.DataEncode(pair.Key) + "=" + WWWTranscoder.DataEncode(pair.Value);
 }
 return System.Text.Encoding.UTF8.GetBytes(queryString);
 }
 }
}