static void UseImage(string url)
{
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(url));
Stream memStream = new MemoryStream();
webReq.Method = "POST";
string boundary = "--------------" + DateTime.Now.Ticks.ToString("x");// 边界符
webReq.ContentType = "multipart/form-data; boundary=" + boundary;
byte[] enter = Encoding.ASCII.GetBytes("\r\n"); //换行
memStream.Write(enter, 0, enter.Length);
Dictionary <string, string> dic = new Dictionary <string, string>()
{
{ "appid", OCRConfig.appid },
{ "bucket", OCRConfig.bucket }
};
//写入文本字段
string inputPartHeaderFormat = "--" + boundary + "\r\n" + "Content-Disposition:form-data;name=\"{0}\";" + "\r\n\r\n{1}\r\n";
foreach (var kv in dic)
{
string inputPartHeader = string.Format(inputPartHeaderFormat, kv.Key, kv.Value);
var inputPartHeaderBytes = Encoding.ASCII.GetBytes(inputPartHeader);
memStream.Write(inputPartHeaderBytes, 0, inputPartHeaderBytes.Length);
}
var fileStream = new FileStream("1.jpg", FileMode.Open, FileAccess.Read);
// 写入文件
string imagePartHeader = "--" + boundary + "\r\n" +
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
"Content-Type: image/jpeg\r\n\r\n";
var header = string.Format(imagePartHeader, "image", "1.jpg");
var headerbytes = Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes, 0, headerbytes.Length);
var buffer = new byte[1024];
int bytesRead;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
memStream.Write(buffer, 0, bytesRead);
}
// 最后的结束符
byte[] endBoundary = Encoding.ASCII.GetBytes("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" + "\r\n" + boundary + "--\r\n");
memStream.Write(endBoundary, 0, endBoundary.Length);
webReq.ContentLength = memStream.Length;
webReq.Headers.Add(HttpRequestHeader.Authorization, OCRApi.HmacSha1Sign());
webReq.Host = OCRConfig.Host;
var requestStream = webReq.GetRequestStream();
memStream.Position = 0;
memStream.CopyTo(requestStream);
HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
var ret = sr.ReadToEnd();
sr.Close();
response.Close();
requestStream.Close();
memStream.Close();
}
/// <summary>
/// 使用Url传递
/// </summary>
/// <param name="postUrl"></param>
static void UseUrl(string postUrl)
{
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", OCRApi.HmacSha1Sign());
client.DefaultRequestHeaders.Host = OCRConfig.Host;
var task = client.PostAsJsonAsync(postUrl, new
{
appid = OCRConfig.appid,
bucket = OCRConfig.bucket,
url = "http://test-123456.image.myqcloud.com/test.jpg"
});
task.Wait();
var responseTask = task.Result.Content.ReadAsStringAsync();
responseTask.Wait();
var result = responseTask.Result;
}