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feat(esp_http_server): Dynamically allocate http server's scratch buffer

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In this commit, esp_http_server's http_parser scratch is made dynamic.
User is asked to give limit size for header and URI, according to which
scratch buufer allocates memory upto limits
This commit is contained in:
hrushikesh.bhosale
2025-01-30 17:18:15 +05:30
parent 88e3ea2ea5
commit 97b6043435
7 changed files with 83 additions and 35 deletions
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11
components/esp_http_server/src/esp_httpd_priv.h
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2018-2024 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2018-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -35,9 +35,6 @@ extern "C" {
* exceed the scratch buffer size and should at least be 8 bytes */
#define PARSER_BLOCK_SIZE 128
/* Calculate the maximum size needed for the scratch buffer */
#define HTTPD_SCRATCH_BUF MAX(HTTPD_MAX_REQ_HDR_LEN, HTTPD_MAX_URI_LEN)
/* Formats a log string to prepend context function name */
#define LOG_FMT(x) "%s: " x, __func__
@@ -88,7 +85,11 @@ struct sock_db {
*/
struct httpd_req_aux {
struct sock_db *sd; /*!< Pointer to socket database */
char scratch[HTTPD_SCRATCH_BUF + 1]; /*!< Temporary buffer for our operations (1 byte extra for null termination) */
char *scratch; /*!< Temporary buffer for our operations (1 byte extra for null termination) */
uint16_t scratch_size_limit; /*!< Scratch buffer size limit */
uint16_t scratch_cur_size; /*!< Scratch buffer cur size */
uint16_t hdr_buf_size_limit; /*!< Header buffer size limit */
uint16_t uri_buf_size_limit; /*!< URI buffer size limit */
size_t remaining_len; /*!< Amount of data remaining to be fetched */
char *status; /*!< HTTP response's status code */
char *content_type; /*!< HTTP response's content type */