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199 lines
7.9 KiB
C#
199 lines
7.9 KiB
C#
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using Newtonsoft.Json;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Xml.Serialization;
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namespace UploadersLib.FileUploaders
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{
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public sealed class MediaFire : FileUploader
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{
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private static readonly string _apiUrl = "https://www.mediafire.com/api/";
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private static readonly string _viewUrl = "http://www.mediafire.com/view/?";
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private static readonly int _pollInterval = 3000;
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private readonly string _appId, _apiKey, _user, _pasw, _path;
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private string _sessionToken, _signatureTime;
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private int _signatureKey;
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public MediaFire(string appId, string apiKey, string user, string pasw, string path)
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{
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_appId = appId;
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_apiKey = apiKey;
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_user = user;
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_pasw = pasw;
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_path = path;
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}
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public override UploadResult Upload(Stream stream, string fileName)
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{
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GetSessionToken();
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string key = SimpleUpload(stream, fileName);
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string quickKey = null;
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while ((quickKey = PollUpload(key, fileName)) == null) System.Threading.Thread.Sleep(_pollInterval);
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return new UploadResult() { IsSuccess = true, URL = _viewUrl + quickKey };
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}
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private void GetSessionToken()
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{
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var args = new Dictionary<string, string>();
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args.Add("email", _user);
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args.Add("password", _pasw);
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args.Add("application_id", _appId);
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args.Add("token_version", "2");
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args.Add("response_format", "json");
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args.Add("signature", GetInitSignature());
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string respStr = SendRequest(HttpMethod.POST, _apiUrl + "user/get_session_token.php", args);
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GetSessionTokenResponse resp = DeserializeResponse<GetSessionTokenResponse>(respStr);
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EnsureSuccess(resp);
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if (resp.session_token == null || resp.time == null || resp.secret_key == null)
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throw new IOException("Invalid response");
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_sessionToken = resp.session_token;
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_signatureTime = resp.time;
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_signatureKey = (int)resp.secret_key;
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}
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private string SimpleUpload(Stream stream, string fileName)
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{
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var args = new Dictionary<string, string>();
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args.Add("session_token", _sessionToken);
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args.Add("path", _path);
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args.Add("response_format", "json");
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args.Add("signature", GetSignature("upload/simple.php", args));
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string url = CreateQuery(_apiUrl + "upload/simple.php", args);
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UploadResult res = UploadData(stream, url, fileName, "Filedata");
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if (!res.IsSuccess) throw new IOException(res.ErrorsToString());
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SimpleUploadResponse resp = DeserializeResponse<SimpleUploadResponse>(res.Response);
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EnsureSuccess(resp);
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if (resp.doupload.result != 0 || resp.doupload.key == null) throw new IOException("Invalid response");
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return resp.doupload.key;
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}
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private string PollUpload(string uploadKey, string fileName)
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{
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var args = new Dictionary<string, string>();
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args.Add("session_token", _sessionToken);
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args.Add("key", uploadKey);
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args.Add("filename", fileName);
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args.Add("response_format", "json");
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args.Add("signature", GetSignature("upload/poll_upload.php", args));
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string respStr = SendRequest(HttpMethod.POST, _apiUrl + "upload/poll_upload.php", args);
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PollUploadResponse resp = DeserializeResponse<PollUploadResponse>(respStr);
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EnsureSuccess(resp);
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if (resp.doupload.result == null || resp.doupload.status == null) throw new IOException("Invalid response");
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if (resp.doupload.result != 0 || resp.doupload.fileerror != null) {
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throw new IOException(string.Format("Couldn't upload the file: {0}", resp.doupload.description
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?? "Unknown error"));
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}
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if (resp.doupload.status == 99) {
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if (resp.doupload.quickkey == null) throw new IOException("Invalid response");
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return resp.doupload.quickkey;
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}
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return null;
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}
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private void EnsureSuccess(MFResponse resp)
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{
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if (resp.result != "Success")
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throw new IOException(string.Format("Couldn't upload the file: {0}", resp.message ?? "Unknown error"));
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if (resp.new_key == "yes") NextSignatureKey();
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}
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private string GetInitSignature()
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{
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string signatureStr = _user + _pasw + _appId + _apiKey;
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byte[] signatureBytes = Encoding.ASCII.GetBytes(signatureStr);
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System.Security.Cryptography.SHA1 sha1Gen = System.Security.Cryptography.SHA1.Create();
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byte[] sha1Bytes = sha1Gen.ComputeHash(signatureBytes);
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return BytesToString(sha1Bytes);
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}
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private string GetSignature(string urlSuffix, Dictionary<string,string> args)
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{
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string keyStr = (_signatureKey % 256).ToString(System.Globalization.CultureInfo.InvariantCulture);
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string urlStr = CreateNonEscapedQuery("/api/" + urlSuffix, args);
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string signatureStr = keyStr + _signatureTime + urlStr;
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byte[] signatureBytes = Encoding.ASCII.GetBytes(signatureStr);
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System.Security.Cryptography.MD5 md5gen = System.Security.Cryptography.MD5.Create();
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byte[] md5Bytes = md5gen.ComputeHash(signatureBytes);
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return BytesToString(md5Bytes);
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}
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void NextSignatureKey()
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{
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_signatureKey = (int)(((long)_signatureKey * 16807) % 2147483647);
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}
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private T DeserializeResponse<T>(string s) where T : new()
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{
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var refObj = new { response = new T() };
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var obj = JsonConvert.DeserializeObject(s, refObj.GetType());
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return (T)obj.GetType().GetProperty("response").GetValue(obj, null);
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}
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private static char IntToChar(int x)
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{
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if (x < 10) return (char)(x + '0');
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return (char)(x - 10 + 'a');
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}
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private static string BytesToString(byte[] b)
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{
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char[] res = new char[b.Length * 2];
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for (int i = 0; i < b.Length; ++i) {
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res[2 * i] = IntToChar(b[i] >> 4);
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res[2 * i + 1] = IntToChar(b[i] & 0xf);
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}
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return new string(res);
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}
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private static string CreateNonEscapedQuery(string url, Dictionary<string, string> args)
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{
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if (args != null && args.Count > 0)
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return url + "?" + string.Join("&", args.Select(x => x.Key + "=" + x.Value).ToArray());
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return url;
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}
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private class MFResponse
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{
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public string result { get; set; }
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public int? error { get; set; }
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public string message { get; set; }
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public string new_key { get; set; }
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}
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private class GetSessionTokenResponse : MFResponse
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{
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public string session_token { get; set; }
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public int? secret_key { get; set; }
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public string time { get; set; }
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}
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private class SimpleUploadResponse : MFResponse
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{
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public DoUpload doupload { get; set; }
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public class DoUpload
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{
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public int? result { get; set; }
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public string key { get; set; }
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}
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}
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private class PollUploadResponse : MFResponse
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{
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public DoUpload doupload { get; set; }
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public class DoUpload
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{
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public int? result { get; set; }
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public int? status { get; set; }
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public string description { get; set; }
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public int? fileerror { get; set; }
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public string quickkey { get; set; }
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}
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}
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}
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}
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