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## 配置转发到WEB后，测试或者转发时会向配置的token即url发送POST请求
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> ⚠ 有一个已经实现好的站点[消息通知](https://msg.allmything.com)
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### 请求体如下
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> post form 参数：
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| key | 类型 | 说明 |
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| ---- | ---- | ---- |
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| from | string | 来源手机号 |
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| content | string | 短信内容 |
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| timestamp | string | 当前时间戳，单位是毫秒，（建议验证与请求调用时间误差不能超过1小时，防止重放欺骗） |
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| sign | string | 当设置secret时，生成的sign签名，用于发送端校验，规则见下方sign校验规则 |
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* get请求的时，以上节点经过urlEncode后加在url上
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* sign部分参考借鉴了[阿里钉钉群机器人的sign生成](https://developers.dingtalk.com/document/app/custom-robot-access)
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### sign校验规则
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把timestamp+"\n"+密钥当做签名字符串，使用HmacSHA256算法计算签名，然后进行Base64 encode，最后再把签名参数再进行urlEncode，得到最终的签名（需要使用UTF-8字符集） | 参数 | 说明 | | ---- | ---- | | timestamp | 当前时间戳，单位是毫秒，（建议验证与请求调用时间误差不能超过1小时，防止重放欺骗） | | secret | 密钥，web通知设置页面，secret |
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示例：
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```Java
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//java
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import javax.crypto.Mac;
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import javax.crypto.spec.SecretKeySpec;
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import org.apache.commons.codec.binary.Base64;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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public class Test {
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public static void main(String[] args) throws Exception {
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Long timestamp = System.currentTimeMillis();
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String secret = "this is secret";
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String stringToSign = timestamp + "\n" + secret;
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Mac mac = Mac.getInstance("HmacSHA256");
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mac.init(new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA256"));
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byte[] signData = mac.doFinal(stringToSign.getBytes(StandardCharsets.UTF_8));
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String sign = URLEncoder.encode(new String(Base64.encodeBase64(signData)), "UTF-8");
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System.out.println(sign);
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}
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}
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```
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```python
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#python 3.8
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import time
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import hmac
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import hashlib
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import base64
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import urllib.parse
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timestamp = str(round(time.time() * 1000))
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secret = 'this is secret'
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secret_enc = secret.encode('utf-8')
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string_to_sign = '{}\n{}'.format(timestamp, secret)
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string_to_sign_enc = string_to_sign.encode('utf-8')
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hmac_code = hmac.new(secret_enc, string_to_sign_enc, digestmod=hashlib.sha256).digest()
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sign = urllib.parse.quote_plus(base64.b64encode(hmac_code))
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print(timestamp)
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print(sign)
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```
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```python
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#python 2.7
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import time
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import hmac
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import hashlib
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import base64
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import urllib
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timestamp = long(round(time.time() * 1000))
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secret = 'this is secret'
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secret_enc = bytes(secret).encode('utf-8')
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string_to_sign = '{}\n{}'.format(timestamp, secret)
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string_to_sign_enc = bytes(string_to_sign).encode('utf-8')
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hmac_code = hmac.new(secret_enc, string_to_sign_enc, digestmod=hashlib.sha256).digest()
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sign = urllib.quote_plus(base64.b64encode(hmac_code))
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print(timestamp)
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print(sign)
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```
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