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

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// 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_UTILS_H_
#define _HTTP_UTILS_H_
#include <sys/time.h>
/**
* @brief Assign new_str to *str pointer, and realloc *str if it not NULL
*
* @param str pointer to string pointer
* @param new_str assign this tring to str
* @param len length of string, 0 if new_str is zero terminated
*
* @return
* - new_str pointer
* - NULL
*/
char *http_utils_assign_string(char **str, const char *new_str, int len);
/**
* @brief Remove white space at begin and end of string
*
* @param[in] str The string
*
* @return New strings have been trimmed
*/
void http_utils_trim_whitespace(char **str);
/**
* @brief Gets the string between 2 string.
* It will allocate a new memory space for this string, so you need to free it when no longer use
*
* @param[in] str The source string
* @param[in] begin The begin string
* @param[in] end The end string
*
* @return The string between begin and end
*/
char *http_utils_get_string_between(const char *str, const char *begin, const char *end);
/**
* @brief Join 2 strings to one
* It will allocate a new memory space for this string, so you need to free it when no longer use
*
* @param[in] first_str The first string
* @param[in] len_first The length first
* @param[in] second_str The second string
* @param[in] len_second The length second
*
* @return
* - New string pointer
* - NULL: Invalid input
*/
char *http_utils_join_string(const char *first_str, int len_first, const char *second_str, int len_second);
/**
* @brief Check if ``str`` is start with ``start``
*
* @param[in] str The string
* @param[in] start The start
*
* @return
* - (-1) if length of ``start`` larger than length of ``str``
* - (1) if ``start`` NOT starts with ``start``
* - (0) if ``str`` starts with ``start``
*/
int http_utils_str_starts_with(const char *str, const char *start);
/**
* @brief Convert milliseconds to timeval struct
*
* @param[in] timeout_ms The timeout milliseconds
* @param[out] tv Timeval struct
*/
void http_utils_ms_to_timeval(int timeout_ms, struct timeval *tv);
#define HTTP_MEM_CHECK(TAG, a, action) if (!(a)) { \
ESP_LOGE(TAG,"%s:%d (%s): %s", __FILE__, __LINE__, __FUNCTION__, "Memory exhausted"); \
action; \
}
#endif