using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections.Specialized; using System.Net; using System.IO; using System.Diagnostics; /** *验证码识别调用示例代码 - 聚合数据 *在线接口文档:http://www.juhe.cn/docs/60 **/ namespace Ver_code { class Program { /// <summary> /// 验证码识别接口调用代码实例 /// </summary> /// <param name="args"></param> public static void Main(string[] args) { NameValueCollection nvc = new NameValueCollection(); //申请的key nvc.Add("key", ""); //验证码类型代码 nvc.Add("codeType", ""); //验证码接口地址 string ApiUrl = "http://op.juhe.cn/vercode/index"; //验证码图片路径 string ver_img = @"G:\img\verifyhandler.jpg"; string result = HttpUploadFile(ApiUrl, ver_img, "image", "image/jpeg", nvc); Debug.WriteLine(result); } /// <summary> /// POST图片等文件(带参数) /// </summary> /// <param name="url">接口地址</param> /// <param name="file">上传文件路径</param> /// <param name="paramName">参数名称</param> /// <param name="contentType">类型</param> /// <param name="nvc">参数</param> /// <returns></returns> public static string HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc) { string result = string.Empty; string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x"); byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n"); HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url); wr.ContentType = "multipart/form-data; boundary=" + boundary; wr.Method = "POST"; wr.KeepAlive = true; wr.Credentials = System.Net.CredentialCache.DefaultCredentials; Stream rs = wr.GetRequestStream(); string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}"; foreach (string key in nvc.Keys) { rs.Write(boundarybytes, 0, boundarybytes.Length); string formitem = string.Format(formdataTemplate, key, nvc[key]); byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem); rs.Write(formitembytes, 0, formitembytes.Length); } rs.Write(boundarybytes, 0, boundarybytes.Length); string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n"; string header = string.Format(headerTemplate, paramName, file, contentType); byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header); rs.Write(headerbytes, 0, headerbytes.Length); FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read); byte[] buffer = new byte[4096]; int bytesRead = 0; while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) { rs.Write(buffer, 0, bytesRead); } fileStream.Close(); byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n"); rs.Write(trailer, 0, trailer.Length); rs.Close(); WebResponse wresp = null; try { wresp = wr.GetResponse(); Stream stream2 = wresp.GetResponseStream(); StreamReader reader2 = new StreamReader(stream2); result = reader2.ReadToEnd(); } catch (Exception ex) { if (wresp != null) { wresp.Close(); wresp = null; } } finally { wr = null; } return result; } } }