public static WeixinMedia uploadMedia(String accessToken, String type, String mediaFileUrl) {
WeixinMedia weixinMedia = null;
// 拼装请求地址
String uploadMediaUrl = "https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=ACCESS_TOKEN&type=TYPE";
uploadMediaUrl = uploadMediaUrl.replace("ACCESS_TOKEN", accessToken).replace("TYPE", type);
// 定义数据分隔符
String boundary = "------------7da2e536604c8";
try {
URL uploadUrl = new URL(uploadMediaUrl);
HttpURLConnection uploadConn = (HttpURLConnection) uploadUrl.openConnection();
uploadConn.setDoOutput(true);
uploadConn.setDoInput(true);
uploadConn.setRequestMethod("POST");
// 设置请求头Content-Type
uploadConn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
// 获取媒体文件上传的输出流(往微信服务器写数据)
OutputStream outputStream = uploadConn.getOutputStream();
URL mediaUrl = new URL(mediaFileUrl);
HttpURLConnection meidaConn = (HttpURLConnection) mediaUrl.openConnection();
meidaConn.setDoOutput(true);
meidaConn.setRequestMethod("GET");
// 从请求头中获取内容类型
String contentType = meidaConn.getHeaderField("Content-Type");
// 根据内容类型判断文件扩展名
String fileExt = WeixinUtil.getFileEndWitsh(contentType);
// 请求体开始
outputStream.write(("--" + boundary + "\r\n").getBytes());
outputStream.write(String.format("Content-Disposition: form-data; name=\"media\"; filename=\"file1%s\"\r\n", fileExt).getBytes());
outputStream.write(String.format("Content-Type: %s\r\n\r\n", contentType).getBytes());
// 获取媒体文件的输入流(读取文件)
BufferedInputStream bis = new BufferedInputStream(meidaConn.getInputStream());
byte[] buf = new byte[8096];
int size = 0;
while ((size = bis.read(buf)) != -1) {
// 将媒体文件写到输出流(往微信服务器写数据)
outputStream.write(buf, 0, size);
}
// 请求体结束
outputStream.write(("\r\n--" + boundary + "--\r\n").getBytes());
outputStream.close();
bis.close();
meidaConn.disconnect();
// 获取媒体文件上传的输入流(从微信服务器读数据)
InputStream inputStream = uploadConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
StringBuffer buffer = new StringBuffer();
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
// 释放资源
inputStream.close();
inputStream = null;
uploadConn.disconnect();
// 使用JSON-lib解析返回结果
JSONObject jsonObject = JSONObject.fromObject(buffer.toString());
// 测试打印结果
System.out.println("打印测试结果"+jsonObject);
weixinMedia = new WeixinMedia();
weixinMedia.setType(jsonObject.getString("type"));
// type等于 缩略图(thumb) 时的返回结果和其它类型不一样
if ("thumb".equals(type))
weixinMedia.setMediaId(jsonObject.getString("thumb_media_id"));
else
weixinMedia.setMediaId(jsonObject.getString("media_id"));
weixinMedia.setCreatedAt(jsonObject.getInt("created_at"));
} catch (Exception e) {
weixinMedia = null;
String error = String.format("上传媒体文件失败:%s", e);
System.out.println(error);
}
return weixinMedia;
}
转换成c#代码