Chapter 2. API Reference
(continued from previous page)
SSL *ssl;
const unsigned char *buf;
long len;
... ...
ret = SSL_use_certificate_ASN1(ssl, len, buf);
}
4.12 X509* SSL_get_peer_certificate (const SSL * ssl)
Arguments:
ssl - SSL point
Return:
peer certification
Description:
get peer certification
Example:
void example(void)
{
SSL *ssl;
X509 *peer;
... ...
peer = SSL_get_peer_certificate(ssl);
}
2.3.5 ESP HTTP Client
Overview
esp_http_client provides an API for making HTTP/S requests from ESP-IDF programs. The steps to use this
API for an HTTP request are:
• esp_http_client_init(): To use the HTTP client, the first thing we must do is create an
esp_http_client by pass into this function with the esp_http_client_config_t configurations.
Which configuration values we do not define, the library will use default.
• esp_http_client_perform(): The esp_http_client argument created from the init function is
needed. This function performs all operations of the esp_http_client, from opening the connection, sending
data, downloading data and closing the connection if necessary. All related events will be invoked in the
event_handle (defined by esp_http_client_config_t). This function performs its job and blocks the
current task until it’s done
• esp_http_client_cleanup(): After completing our esp_http_client’s task, this is the last function
to be called. It will close the connection (if any) and free up all the memory allocated to the HTTP client
Application Example
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