您好,登錄后才能下訂單哦!
------WebKitFormBoundary8gsfyexbIoO5OYAa Content-Disposition: form-data; name="username" admin ------WebKitFormBoundary8gsfyexbIoO5OYAa Content-Disposition: form-data; name="submit" 登錄 ------WebKitFormBoundary8gsfyexbIoO5OYAa Content-Disposition: form-data; name="MAX_FILE_SIZE"; filename="2aêo1üàí.txt" Content-Type: text/plain //未識別的文件格式,如rar為Content-Type: application/octet-stream。pdf則為Content-Type: application/pdf ------WebKitFormBoundary8gsfyexbIoO5OYAa--
請求數(shù)據(jù)流格式為: ------固定邊界字符 //1、該邊界字符與請求頭中一致 Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryXXBQdgnAyMZzuaXZ Content-Disposition: form-data; name="username" //2、內(nèi)容描述與內(nèi)容名稱 //2.1、若上傳文件 則需要填寫文件類型 Content-Type: text/plain //3、空行 //4、字符串或文件二進(jìn)制 //若有其他數(shù)據(jù)需要提交 則重復(fù)1-4 ------固定邊界字符//5、在最后應(yīng)添加邊界結(jié)尾
c# 模擬上傳文件代碼
public PostFile(string action,string file) { //1、數(shù)據(jù)邊界 string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x"); //2、創(chuàng)建HttpWebRequest請求 HttpWebRequest myRequest = WebRequest.Create(action) as HttpWebRequest; myRequest.Method = "POST"; //3、設(shè)置請求ContentType 和 邊界字符(邊界字符必須和請求數(shù)據(jù)體的邊界字符一致 否則服務(wù)器無法解析) myRequest.ContentType = "multipart/form-data;boundary=" + boundary; //4、添加文件數(shù)據(jù)描述信息 StringBuilder sb = new StringBuilder(); sb.Append("--" + boundary); sb.Append("\r\n"); //name 為 上傳文件的input name sb.Append("Content-Disposition: form-data; name='MAX_FILE_SIZE'; filename=\"" + file + "\""); sb.Append("\r\n"); sb.Append("Content-Type: application/octet-stream"); //此處則為模擬的文件類型,實(shí)際情況下瀏覽器會根據(jù)本地文件后綴名判斷此類型 sb.Append("\r\n\r\n"); Encoding encoding = Encoding.GetEncoding("gbk"); //此處編碼須與網(wǎng)頁編碼一直 否則導(dǎo)致中文路徑或文件名亂碼 但文件內(nèi)容不會亂碼 byte[] form_data = encoding.GetBytes(sb.ToString()); //5、表尾數(shù)據(jù) byte[] foot_data = encoding.GetBytes("\r\n--" + boundary + "--\r\n"); //6、讀取文件 using (FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read)) { StringBuilder sb2 = new StringBuilder(); sb2.Append("--" + boundary); sb2.Append("\r\n"); sb2.Append("Content-Disposition: form-data; name='username';\r\n"); //發(fā)送的內(nèi)容標(biāo)題 sb2.Append("\r\n"); sb2.Append("中文名稱"); //發(fā)送的內(nèi)容 sb2.Append("\r\n"); //每一組數(shù)據(jù)結(jié)束都需要添加換行字符 sb2.Append("--" + boundary); sb2.Append("\r\n"); sb2.Append("Content-Disposition: form-data; name='pwd';\r\n"); sb2.Append("\r\n"); sb2.Append("QADSFDSFA"); sb2.Append("\r\n"); byte[] data = encoding.GetBytes(sb2.ToString()); //6、設(shè)置上傳數(shù)據(jù)長度為表頭 + 文件 + 表尾長度 myRequest.ContentLength = form_data.Length + foot_data.Length + fileStream.Length + data.Length; //7、得到請求的數(shù)據(jù)流 Stream requestStream = myRequest.GetRequestStream(); //8.1、將字符信息數(shù)據(jù)寫入請求流 requestStream.Write(data, 0, data.Length); //8.2、將文件信息數(shù)據(jù)寫入請求流 requestStream.Write(form_data, 0, form_data.Length); //9、循環(huán)讀取文件流 并寫入請求流 byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))]; int bytesRead = 0; while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) { requestStream.Write(buffer, 0, bytesRead); } //10、將結(jié)束邊界數(shù)據(jù)寫入請求流 requestStream.Write(foot_data, 0, foot_data.Length); } //11、發(fā)起請求 HttpWebResponse myResponse = myRequest.GetResponse() as HttpWebResponse; //12、讀取請求返回的數(shù)據(jù)流 StreamReader sr = new StreamReader(myResponse.GetResponseStream(), encoding); string json = sr.ReadToEnd().Trim(); Clipboard.SetText(json); MessageBox.Show(json); }
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報,并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。