文档：https://doc.sm.ms/#api-Image-Upload
token可以用这个：kIx4W27pUnzR5pW4oiChWf06dYrlhbZQ
public static void UploadImage(string imgPath, string token)
{
const string BASE_SMMS_URL = "https://sm.ms/api/v2";
imgPath = HttpUtility.UrlDecode(imgPath, Encoding.UTF8);
if (imgPath.StartsWith("file:///")) imgPath = imgPath.Split(new string[] { "file:///" }, StringSplitOptions.None)[1];
if (!File.Exists(imgPath))
{
throw new Exception("不存在该图片");
}
var postUrl = BASE_SMMS_URL + "/upload";
HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;
request.AllowAutoRedirect = true;
request.Method = "POST";
request.Headers["Authorization"] = token;
request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36 Edg/80.0.361.48";
string boundary = DateTime.Now.Ticks.ToString("x");
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
int pos = imgPath.LastIndexOf("\\");
string fileName = imgPath.Substring(pos + 1);
//请求头部信息
StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
FileStream fs = new FileStream(imgPath, FileMode.Open, FileAccess.Read);
byte[] bArr = new byte[fs.Length];
fs.Read(bArr, 0, bArr.Length);
fs.Close();
Stream postStream = request.GetRequestStream();
postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
postStream.Write(bArr, 0, bArr.Length);
postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
postStream.Close();
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream instream = response.GetResponseStream();
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
string content = sr.ReadToEnd();
}
python实现参考：https://blog.csdn.net/mbh12333/article/details/102860282
