Add esp_http_client

Add error handling for http client

set ssid password correct with Example_WIFI test, and clear password before free

Fixed the CI failure due to HTTP errror names

components/esp_http_client/lib/include/http_header.h

@@ -0,0 +1,128 @@
+// 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 "rom/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();
+
+/**
+ * @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