错误信息：
"Error":{"Code":"AuthFailure.SignatureFailure","Message":"The provided credentials could not be validated. Please check your signature is correct."
签名及POST代码如下：
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Web.Script.Serialization;
using System.Windows.Forms;
namespace TengXunCloudAPI
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private Dictionary<string, string> GetSign()
{
// 密钥参数
string SECRET_ID = textBox1.Text;
string SECRET_KEY = textBox2.Text;
string service = "tmt";
string endpoint = "tmt.tencentcloudapi.com";
string region = "ap-chengdu";
string action = "TextTranslate";
string version = "2018-03-21";
string algorithm = "TC3-HMAC-SHA256";
string contentType = "application/json";
string requestPayload = "{"Limit": 1, "Filters": [{"Values": ["\u672a\u547d\u540d"], "Name": "instance-name"}]}";
DateTime date = DateTime.UtcNow;
//DateTime date = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(1632109194);
string datestr = date.ToString("yyyy-MM-dd");
DateTime startTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
long requestTimestamp = (long)Math.Round((date - startTime).TotalMilliseconds, MidpointRounding.AwayFromZero) / 1000;
// ************* 步骤 1：拼接规范请求串 *************
string httpRequestMethod = "POST";
string canonicalUri = "/";
string canonicalQueryString = "";
string canonicalHeaders = "content-type:" contentType "; charset=utf-8n" "host:" endpoint "n";
string signedHeaders = "content-type;host";
string hashedRequestPayload = SHA256Hex(requestPayload);
string canonicalRequest = httpRequestMethod "n"
canonicalUri "n"
canonicalQueryString "n"
canonicalHeaders "n"
signedHeaders "n"
hashedRequestPayload;
Console.WriteLine(canonicalRequest);
// ************* 步骤 2：拼接待签名字符串 *************
string credentialScope = datestr "/" service "/" "tc3_request";
string hashedCanonicalRequest = SHA256Hex(canonicalRequest);
string stringToSign = algorithm "n" requestTimestamp.ToString() "n" credentialScope "n" hashedCanonicalRequest;
Console.WriteLine(stringToSign);
// ************* 步骤 3：计算签名 *************
byte[] tc3SecretKey = Encoding.UTF8.GetBytes("TC3" SECRET_KEY);
byte[] secretDate = HmacSHA256(tc3SecretKey, Encoding.UTF8.GetBytes(datestr));
byte[] secretService = HmacSHA256(secretDate, Encoding.UTF8.GetBytes(service));
byte[] secretSigning = HmacSHA256(secretService, Encoding.UTF8.GetBytes("tc3_request"));
byte[] signatureBytes = HmacSHA256(secretSigning, Encoding.UTF8.GetBytes(stringToSign));
string signature = BitConverter.ToString(signatureBytes).Replace("-", "").ToLower();
Console.WriteLine(signature);
// ************* 步骤 4：拼接 Authorization *************
string authorization = algorithm " "
"Credential=" SECRET_ID "/" credentialScope ", "
"SignedHeaders=" signedHeaders ", "
"Signature=" signature;
Console.WriteLine(authorization);
Dictionary<string, string> headers = new Dictionary<string, string>();
headers.Add("Authorization", authorization);
//headers.Add("Host", endpoint);
//headers.Add("Content-Type", contentType "; charset=utf-8");
headers.Add("X-TC-Timestamp", requestTimestamp.ToString());
headers.Add("X-TC-Version", version);
headers.Add("X-TC-Action", action);
headers.Add("X-TC-Region", region);
return headers;
}
private Dictionary<string, string> GetParameters()
{
Dictionary<string, string> parameters = new Dictionary<string, string>();
parameters.Add("Action", "TextTranslate");
parameters.Add("ProjectId", "0");
parameters.Add("Source", "zh");
parameters.Add("SourceText", Encoding.UTF8.GetString(Encoding.UTF8.GetBytes(textBox3.Text)));
parameters.Add("Target", "en");
parameters.Add("Version", "2018-03-21");
parameters.Add("Region", "ap-chengdu");
return parameters;
}
private string Post(string url, Dictionary<string, string> headerdatas)
{
try
{
Dictionary<string, string> parameters = GetParameters();
string result = "";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.ContentType = "application/json";
foreach (var data in headerdatas)
{
request.Headers.Add(data.Key, data.Value);
}
StringBuilder builder = new StringBuilder();
int i = 0;
foreach (var item in parameters)
{
if (i > 0)
builder.Append("&");
builder.AppendFormat("{0}={1}", item.Key, item.Value);
i ;
}
string jsonStr = new JavaScriptSerializer().Serialize(builder);
var temp = Encoding.UTF8.GetBytes(jsonStr.ToString());
request.ContentLength = temp.Length;
using (var stream = request.GetRequestStream())
{
stream.Write(temp, 0, temp.Length);
}
var response = (HttpWebResponse)request.GetResponse();
using (var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
{
result = reader.ReadToEnd();
}
if (result != "")
{
JObject jo = (JObject)JsonConvert.DeserializeObject(result);
String errorCode = jo["ret"].ToString();
if (errorCode == "0")
{
String dataJObject = jo["data"].ToString();
JObject dataResult = (JObject)JsonConvert.DeserializeObject(dataJObject);
string translateResult = dataResult["target_text"].ToString();
return translateResult;
}
return "参数错误，请检查设置！";
}
return "Error";
}
catch (Exception ex)
{
return ex.Message;
}
}
public static string SHA256Hex(string s)
{
using (SHA256 algo = SHA256.Create())
{
byte[] hashbytes = algo.ComputeHash(Encoding.UTF8.GetBytes(s));
StringBuilder builder = new StringBuilder();
for (int i = 0; i < hashbytes.Length; i)
{
builder.Append(hashbytes[i].ToString("x2"));
}
return builder.ToString();
}
}
public static byte[] HmacSHA256(byte[] key, byte[] msg)
{
using (HMACSHA256 mac = new HMACSHA256(key))
{
return mac.ComputeHash(msg);
}
}
private void button1_Click(object sender, EventArgs e)
{
Post("https://tmt.tencentcloudapi.com", GetSign());
}
}
}
调整了好多参数都未能成功，贴出来请教下大家，帮忙给看看是哪里出了问题。小弟在此先谢过了！
