使用Curl和PHP发送认证请求头：API下单无响应求助

Hey there, let's work through this together—silent failures with APIs can be frustrating, especially when your code doesn't throw any errors. Let's break down the most likely issues and how to check them:

Since this API uses key pair auth, it's super common for auth to fail quietly without triggering an error in your code. Here's what to check:

• Double-check you're using the right key pair—don't mix up public/private keys, and make sure you're using the correct set for your environment (test vs production). It's easy to copy-paste the wrong key by accident!
• Verify your request signing matches the Authentication API Docs exactly. Many APIs require you to sign specific parts of the request (like timestamp, HTTP method, or request body) with your private key using a specific hash algorithm (SHA256, etc.). Even a missing character or wrong algorithm will make the API reject your request without telling you clearly.
• Add debug logging to print out the auth header(s) you're sending. Compare them to the examples in the docs—does the header name match (e.g., Authorization vs Signature)? Is the formatted string exactly what the API expects?

Just because your code doesn't throw an error doesn't mean the API accepted your order. Many APIs send a 200 OK response but hide error details in the response body. Do this:

• Print out the full response content from the SubmitOrder call, not just checking if the request "succeeded" without exceptions. Look for fields like success, error_message, or status_code—these will often tell you why the order wasn't processed.
• Cross-reference every field in your order payload with the SubmitOrder API Docs. Did you miss a required field? Send a string instead of a number (like "quantity": "1" instead of "quantity": 1)? Or use an invalid value (e.g., "DELIVER" when the API expects "SHIP")?
• Make sure you're setting the correct Content-Type header. If you're sending JSON data, the header needs to be application/json—without it, the API might not parse your payload at all.

Isolate the problem by testing with a tool like Postman or curl. This will tell you if the issue is with your code or with the API credentials/order details:

• Follow the Authentication API Docs to manually sign a SubmitOrder request in Postman. If this works, the problem is in how your code implements the auth or request formatting. If it doesn't work, you'll get clearer error messages from the tool, or know there's an issue with your account/keys.
• Here's a quick curl example to adapt (adjust based on your API's requirements):

  curl -X POST https://your-api-url.com/submit-order \
    -H "Content-Type: application/json" \
    -H "Authorization: Signature <your-signed-request-string>" \
    -d '{"product_id": "123", "quantity": 2, "shipping_address": "123 Main St"}'
  

Sometimes silent failures happen because of account restrictions you might not know about:

• Check the API docs for rate limit rules—did you send too many requests too quickly? Some APIs throttle requests without sending an error.
• Log into your API provider's dashboard (if available) to confirm your account is active, has enough quota/funds, and doesn't have any pending restrictions.

内容的提问来源于stack exchange，提问作者Greg Matthews