清华大佬耗费三个月吐血整理的几百G的资源，免费分享！....>>>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 | using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.IO;using System.Text;using System.Net;namespace simpleDemo{ class Program { /// <summary> /// 下载文件保留字 /// </summary> public static string PERSIST_EXP = ".cdel"; /// <summary> public static void Main(string[] args) { string path = "D:\\aa.txt"; string ec = getFileEncoding(path, "GB2312"); print("coding: " + ec); // string content = fileReader(path, Encoding.GetEncoding(ec)); // print(content); //fileWriter(path, "测试内容11", Encoding.GetEncoding(ec)); string url = "http://www.XXX.com/20120920172200024.flv"; string path1 = "D:\\aa1.flv"; download(url, path1); //gapDownload(url, path1); //t(url); } public static void t(string url) { HttpWebRequest request = (System.Net.HttpWebRequest)HttpWebRequest.Create(url); //WebResponse response = httpClient.CreateGetHttpResponse(url, 3000, null, null); try { WebResponse response = request.GetResponse(); WebHeaderCollection headers = response.Headers; print(response.ContentLength); request = (System.Net.HttpWebRequest)HttpWebRequest.Create(url); request.AddRange(11); //设置Range值 WebResponse response1 = request.GetResponse(); print(response1.ContentLength); foreach (string key in headers) { print(key + "----- " + headers.Get(key)); } string disposition = headers.Get("Content-Disposition"); print(disposition); }catch(Exception e){ print(e.Message); } //string fileName = disposition.Substring(disposition.IndexOf("\"")); //print(fileName); } public static void download(string url, string path) { if (File.Exists(path)) { print("文件己存在！是否重新下载？"); return; } else { path = path + PERSIST_EXP; simpleDownload(url,path);//开始下载 } } /// <summary> /// 下载网络资源(支持断点续传) /// </summary> /// <param name="url"></param> /// <param name="path"></param> public static void simpleDownload(string url, string path) { HttpWebRequest request = httpClient.getWebRequest(url, 0); WebResponse response = null; FileStream writer = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write); long lStartPos = writer.Length; ;//当前文件大小 long currentLength = 0; long totalLength = 0;//总大小 if (File.Exists(path))//断点续传 { response = request.GetResponse(); long sTotal = response.ContentLength; if (sTotal == lStartPos) { close(writer); File.Move(path, path.Replace(PERSIST_EXP, "")); print("下载完成!"); return; } request = httpClient.getWebRequest(url, (int)lStartPos);//设置Range值 writer.Seek(lStartPos, SeekOrigin.Begin);//指针跳转 response = request.GetResponse(); totalLength = response.ContentLength + lStartPos; //总长度 currentLength = lStartPos; //当前长度 } else { response = request.GetResponse(); totalLength = response.ContentLength; } Stream reader = response.GetResponseStream(); byte[] buff = new byte[1024]; int c = 0; //实际读取的字节数 while ((c = reader.Read(buff, 0, buff.Length)) > 0) { currentLength += c; writer.Write(buff, 0, c); progressBar(currentLength, totalLength);//进度条 writer.Flush(); } close(writer); if (currentLength == totalLength) { File.Move(path, path.Replace(PERSIST_EXP, "")); print("下载完成!"); } if (reader != null) { reader.Close(); reader.Dispose(); response.Close(); } } private static void close(FileStream writer) { if (writer != null) { writer.Close(); writer.Dispose(); } } /// <summary> /// 进度条 /// </summary> /// <param name="currentLength">当前长度</param> /// <param name="totalLength">总长度</param> public static void progressBar(Object currentLength, Object totalLength) { double aaa = System.Convert.ToDouble(currentLength); double bbb = System.Convert.ToDouble(totalLength); print(currentLength + "/" + totalLength + "__" + (aaa / bbb).ToString("0.00 %")); } /// <summary> /// 系统输出 /// </summary> /// <param name="obj"></param> public static void print(Object obj){ Console.WriteLine(obj); } public static void printStr(string[] str) { foreach (string d in str) { print(d); } } /// <summary> /// 文件写 /// </summary> /// <param name="path">文件路径</param> /// <param name="content">要写入的内容</param> public static void fileWriter(string path,string content,Encoding encoding) { if (File.Exists(path)) { StreamWriter sw = new StreamWriter(path, true, encoding); sw.WriteLine(content); sw.Flush(); sw.Close(); } } /// <summary> /// 读文件，返回内容 /// </summary> /// <param name="path">文件路径</param> /// <param name="enCoding">默认编码格式</param> /// <returns></returns> public static string fileReader(string path,Encoding enCoding) { StringBuilder sb = new StringBuilder(); if(enCoding == null){ enCoding = Encoding.Default; } //读取文件 StreamReader sr = new StreamReader(path, enCoding); string s = ""; while ((s = sr.ReadLine()) != null) { sb.AppendLine(s); } if(sr != null) sr.Close(); return sb.ToString(); } /// <summary> /// 获取文件编码格式 /// </summary> /// <param name="path">文件路径</param> /// <param name="defaultEncoding">默认编码</param> /// <returns></returns> public static string getFileEncoding(string path, string defaultEncoding) { string ed = defaultEncoding; if (File.Exists(path)) { FileStream fs = new FileStream(path, FileMode.Open); ed = GetEncoding(fs, defaultEncoding); if (fs != null) fs.Close(); } return ed; } /// <summary> /// 取得一个文本文件流的编码方式。 /// </summary> /// <param name="stream">文本文件流。</param> /// <param name="defaultEncoding">默认编码方式。当该方法无法从文件的头部取得有效的前导符时，将返回该编码方式。</param> /// <returns></returns> public static string GetEncoding(FileStream stream, string defaultEncoding) { string targetEncoding = defaultEncoding; if (stream != null && stream.Length >= 2) { //保存文件流的前4个字节 byte byte1 = 0; byte byte2 = 0; byte byte3 = 0; byte byte4 = 0; //保存当前Seek位置 long origPos = stream.Seek(0, SeekOrigin.Begin); stream.Seek(0, SeekOrigin.Begin); int nByte = stream.ReadByte(); byte1 = Convert.ToByte(nByte); byte2 = Convert.ToByte(stream.ReadByte()); if (stream.Length >= 3) { byte3 = Convert.ToByte(stream.ReadByte()); } if (stream.Length >= 4) { byte4 = Convert.ToByte(stream.ReadByte()); } //根据文件流的前4个字节判断Encoding //Unicode {0xFF, 0xFE}; //BE-Unicode {0xFE, 0xFF}; //UTF8 = {0xEF, 0xBB, 0xBF}; if (byte1 == 0xFE && byte2 == 0xFF)//UnicodeBe { targetEncoding = Encoding.BigEndianUnicode.BodyName; } if (byte1 == 0xFF && byte2 == 0xFE && byte3 != 0xFF)//Unicode { targetEncoding = Encoding.Unicode.BodyName; } if (byte1 == 0xEF && byte2 == 0xBB && byte3 == 0xBF)//UTF8 { targetEncoding = Encoding.UTF8.BodyName; } //恢复Seek位置 stream.Seek(origPos, SeekOrigin.Begin); } return targetEncoding; } }}using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net;using System.Net.Security;using System.Security.Cryptography.X509Certificates;using System.IO;namespace simpleDemo{ /// <summary> /// 公用 Http 请求类 /// </summary> class httpClient { /// <summary> /// 获取基础WebRequest /// </summary> /// <param name="url">请求地址</param> /// <param name="lStartPos">请求的开始位置</param> /// <returns></returns> public static HttpWebRequest getWebRequest(string url, int lStartPos) { HttpWebRequest request = null; try { request = (System.Net.HttpWebRequest)HttpWebRequest.Create(url); request.AddRange(lStartPos); //设置Range值 } catch (Exception ex) { Program.print(ex.Message); } return request; } }} |