Question
I'm developing a Tizen native application that needs to make HTTP requests (both GET and POST methods). I've referenced the official documentation on HTTP requests (https://developer.tizen.org/development/guides/native-application/connectivity-and-wireless/internet-and-contents-downloads/http).
While the GET method works fine, I'm having trouble with the POST method. I'm not getting a successful response, which I believe is due to incorrect parameter passing. Currently, I'm passing parameters like this:
const char* post_msg = "email=abcd@gmail.com&password=12312345678";
Could anyone help me understand the correct way to pass parameters in a POST request?
Answer
Problem Understanding
The issue occurs when trying to pass parameters in an HTTP POST request in a Tizen native application. While the request structure is correct, the parameter passing method needs adjustment.
Solution Methods
-
Using http_transaction_request_write_body():
- This is the proper way to write POST body data in Tizen native applications
- Ensure you set the correct Content-Type header (typically "application/x-www-form-urlencoded")
-
Parameter Format:
- Make sure parameters are properly URL-encoded
- Use the standard key=value&key=value format
Code Examples
Here's a complete example of how to properly make a POST request:
#include <http.h>
void make_post_request() {
http_transaction_h transaction;
http_request_h request;
const char* url = "https://your-api-endpoint.com/login";
const char* post_data = "email=test%40example.com&password=secure123";
// Create HTTP request
http_request_create(&request);
http_request_set_method(request, HTTP_METHOD_POST);
http_request_set_url(request, url);
http_request_set_header(request, "Content-Type", "application/x-www-form-urlencoded");
// Create transaction
http_transaction_create(request, &transaction);
http_transaction_set_write_cb(transaction, write_callback, NULL);
http_transaction_set_read_cb(transaction, read_callback, NULL);
// Write POST data
http_transaction_request_write_body(transaction, post_data, strlen(post_data));
// Submit transaction
http_transaction_submit(transaction);
// Cleanup
http_transaction_destroy(transaction);
http_request_destroy(request);
}
Additional Tips
- Always check return values from HTTP API calls
- Use proper error handling
- For complex data, consider using JSON format instead of form-urlencoded
- Remember to URL-encode special characters in your parameters
