- 1 year ago
HttpSendRequestA is false and return 0
When using the HttpSendRequestA
function in WinINet and it returns FALSE
with a value of 0
, it indicates that the function failed. Here are a few common reasons and troubleshooting steps to consider:
Invalid parameters: Check if you have provided valid and correct parameters to the
HttpSendRequestA
function. Ensure that the request handle, headers, and optional data are properly set.Internet connectivity: Verify that you have an active and stable internet connection. A failed request can occur if the connection is not available or if there are network issues. Try accessing the requested URL in a web browser to confirm connectivity.
Proxy settings: If you are using a proxy server to connect to the internet, ensure that the proxy settings are configured correctly. Use the
InternetSetOption
function to set the proxy settings for the request handle usingINTERNET_OPTION_PROXY
.Security protocols: If the requested URL uses secure HTTPS protocol, ensure that the security protocols and certificates are configured properly. Check if the certificate is valid and trusted. You may need to use the
InternetSetOption
function to set security options usingINTERNET_OPTION_SECURITY_FLAGS
.Error handling: After
HttpSendRequestA
returnsFALSE
, use theGetLastError
function to retrieve the error code. The error code can provide more specific information about the failure. You can useFormatMessage
to obtain a descriptive error message based on the error code.WinINet initialization: Make sure you have initialized the WinINet library before calling the
HttpSendRequestA
function. You can use theInternetOpen
function to initialize WinINet and obtain a handle for subsequent operations.
By examining these possible issues and taking appropriate troubleshooting steps, you should be able to diagnose and resolve the failure of HttpSendRequestA
.