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_auth.h

@@ -0,0 +1,60 @@
+// 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_BASIC_AUTH_H_
+#define _HTTP_BASIC_AUTH_H_
+
+/**
+ * HTTP Digest authentication data
+ */
+typedef struct {
+    char *method;       /*!< Request method, example: GET */
+    char *algorithm;    /*!< Authentication algorithm */
+    char *uri;          /*!< URI of request example: /path/to/file.html */
+    char *realm;        /*!< Authentication realm */
+    char *nonce;        /*!< Authentication nonce */
+    char *qop;          /*!< Authentication qop */
+    char *opaque;       /*!< Authentication opaque */
+    uint64_t cnonce;    /*!< Authentication cnonce */
+    int nc;             /*!< Authentication nc */
+} esp_http_auth_data_t;
+
+/**
+ * @brief      This use for Http digest authentication method, create http header for digest authentication.
+ *             The returned string need to free after use
+ *
+ * @param[in]  username   The username
+ * @param[in]  password   The password
+ * @param      auth_data  The auth data
+ *
+ * @return
+ *     - HTTP Header value of Authorization, valid for digest authentication, must be freed after usage
+ *     - NULL
+ */
+char *http_auth_digest(const char *username, const char *password, esp_http_auth_data_t *auth_data);
+
+/**
+ * @brief      This use for Http basic authentication method, create header value for basic http authentication
+ *            The returned string need to free after use
+ *
+ * @param[in]  username  The username
+ * @param[in]  password  The password
+ *
+ * @return
+ *     - HTTP Header value of Authorization, valid for basic authentication, must be free after use
+ *     - NULL
+ */
+char *http_auth_basic(const char *username, const char *password);
+#endif