esp-idf/components/esp_http_client/lib/include/http_header.h

129 wiersze
3.5 KiB
C

// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _HTTP_HEADER_H_
#define _HTTP_HEADER_H_
#include "sys/queue.h"
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct http_header *http_header_handle_t;
typedef struct http_header_item *http_header_item_handle_t;
/**
* @brief initialize and allocate the memory for the header object
*
* @return
* - http_header_handle_t
* - NULL if any errors
*/
http_header_handle_t http_header_init(void);
/**
* @brief Cleanup and free all http header pairs
*
* @param[in] header The header
*
* @return
* - ESP_OK
* - ESP_FAIL
*/
esp_err_t http_header_clean(http_header_handle_t header);
/**
* @brief Cleanup with http_header_clean and destroy http header handle object
*
* @param[in] header The header
*
* @return
* - ESP_OK
* - ESP_FAIL
*/
esp_err_t http_header_destroy(http_header_handle_t header);
/**
* @brief Add a key-value pair of http header to the list,
* note that with value = NULL, this function will remove the header with `key` already exists in the list.
*
* @param[in] header The header
* @param[in] key The key
* @param[in] value The value
*
* @return
* - ESP_OK
* - ESP_FAIL
*/
esp_err_t http_header_set(http_header_handle_t header, const char *key, const char *value);
/**
* @brief Sample as `http_header_set` but the value can be formated
*
* @param[in] header The header
* @param[in] key The key
* @param[in] format The format
* @param[in] ... format parameters
*
* @return Total length of value
*/
int http_header_set_format(http_header_handle_t header, const char *key, const char *format, ...);
/**
* @brief Get a value of header in header list
* The address of the value will be assign set to `value` parameter or NULL if no header with the key exists in the list
*
* @param[in] header The header
* @param[in] key The key
* @param[out] value The value
*
* @return
* - ESP_OK
* - ESP_FAIL
*/
esp_err_t http_header_get(http_header_handle_t header, const char *key, char **value);
/**
* @brief Create HTTP header string from the header with index, output string to buffer with buffer_len
* Also return the last index of header was generated
*
* @param[in] header The header
* @param[in] index The index
* @param buffer The buffer
* @param buffer_len The buffer length
*
* @return The last index of header was generated
*/
int http_header_generate_string(http_header_handle_t header, int index, char *buffer, int *buffer_len);
/**
* @brief Remove the header with key from the headers list
*
* @param[in] header The header
* @param[in] key The key
*
* @return
* - ESP_OK
* - ESP_FAIL
*/
esp_err_t http_header_delete(http_header_handle_t header, const char *key);
#ifdef __cplusplus
}
#endif
#endif