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Merge branch 'http_optimized_get' into 'main'

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new mechanism of file response over http

See merge request userbogd/webguiapp!1
This commit is contained in:
Bogdan Pilyugin 2022-10-31 13:11:35 +00:00
commit e17ac36c27
3 changed files with 138 additions and 63 deletions
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3
include/HTTPServer.h
View File

@ -43,10 +43,11 @@
#include "esp_eth.h"
#include "mbedtls/base64.h"
#define MAX_DYNVAR_NAME_LENGTH 32
#define MAX_DYNVAR_LENGTH 256
#define MAX_INCFILE_LENGTH 1024
#define HTTP_SERVER_DEBUG_LEVEL 0
#define HTTP_SERVER_DEBUG_LEVEL 1
typedef enum
{

6
src/HTTPPrintSystem.c
View File

@ -584,6 +584,11 @@ static void HTTPPrint_ifc_mq2(char *VarData, void *arg)
#endif
}
static void HTTPPrint_testvariable(char *VarData, void *arg)
{
static int counter = 1;
snprintf(VarData, MAX_DYNVAR_LENGTH, "[Long extended dynamic variable number %d]", counter++);
}
//Default string if not found handler
static void HTTPPrint_DEF(char *VarData, void *arg)
@ -703,6 +708,7 @@ dyn_var_handler_t HANDLERS_ARRAY[] = {
{ "ifc_gprs", sizeof("ifc_gprs") - 1, &HTTPPrint_ifc_gprs },
{ "ifc_mq2", sizeof("ifc_mq2") - 1, &HTTPPrint_ifc_mq2 },
{ "testvariable", sizeof("testvariable") - 1, &HTTPPrint_testvariable},
};

162
src/HTTPServer.c
View File

@ -34,10 +34,9 @@ static esp_err_t CheckAuth(httpd_req_t *req);
/* Max size of an individual file. Make sure this
* value is same as that set in upload_script.html */
#define MAX_FILE_SIZE (200*1024) // 200 KB
#define MAX_FILE_SIZE_STR "200KB"
/* Scratch buffer size */
#define SCRATCH_BUFSIZE 8192
#define SCRATCH_BUFSIZE 4096
#define AUTH_DATA_MAX_LENGTH 16
struct file_server_data
@ -52,6 +51,13 @@ struct file_server_data *server_data = NULL;
httpd_handle_t server = NULL;
static const char *TAG = "HTTPServer";
//Pointer to external user defined rest api handler
static int (*HTTPUserRestAPI)(char *url, char *req, int len, char *resp) = NULL;
void regHTTPUserRestAPI(int (*api_handler)(char *url, char *req, int len, char *resp))
{
HTTPUserRestAPI = api_handler;
}
static esp_err_t CheckAuth(httpd_req_t *req)
{
unsigned char pass[18] = { 0 }; //max length of login:password decoded string
@ -169,6 +175,16 @@ static const char* get_path_from_uri(char *dest, const char *base_path,
return dest + base_pathlen;
}
static esp_err_t RestApiHandler(httpd_req_t *req)
{
#if HTTP_SERVER_DEBUG_LEVEL > 0
ESP_LOGI(TAG, "REST API handler");
#endif
httpd_resp_sendstr(req, "{\"apiver\":\"1.00\",\"result\":\"OK\"}"); // Response body can be empty
return ESP_OK;
}
static esp_err_t POSTHandler(httpd_req_t *req)
{
#if HTTP_SERVER_DEBUG_LEVEL > 0
@ -210,6 +226,12 @@ static esp_err_t POSTHandler(httpd_req_t *req)
((struct file_server_data*) req->user_ctx)->base_path,
req->uri,
sizeof(filepath));
if (!memcmp(filename, "/api", 4))
{
return RestApiHandler(req);
}
http_res = HTTPPostApp(req, filename, buf);
if (http_res == HTTP_IO_DONE)
@ -252,6 +274,8 @@ static esp_err_t GETHandler(httpd_req_t *req)
espfs_file_t *file;
struct espfs_stat_t stat;
bool isDynamicVars = false;
uint32_t bufSize; //size of ram buffer for chunk of data, read from file
uint32_t readBytes; //number of bytes, read from file. used for information only
const char *filename = get_path_from_uri(filepath,
((struct file_server_data*) req->user_ctx)->base_path,
@ -305,62 +329,121 @@ static esp_err_t GETHandler(httpd_req_t *req)
set_content_type_from_file(req, filename);
/* Retrieve the pointer to scratch buffer for temporary storage */
char *chunk = ((struct file_server_data*) req->user_ctx)->scratch;
uint32_t readBytes, fileSize;
fileSize = stat.size;
char *buf = (char*) malloc(fileSize);
if (buf)
{
readBytes = espfs_fread(file, buf, fileSize);
}
else
bufSize = MIN(stat.size, SCRATCH_BUFSIZE - MAX_DYNVAR_LENGTH);
readBytes = 0;
//allocate buffer for file data
char *buf = (char*) malloc(bufSize);
if (!buf)
{
ESP_LOGE(TAG, "Failed to allocate memory");
/* Respond with 500 Internal Server Error */
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR,
"Out of memory");
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Out of memory");
espfs_fclose(file);
return ESP_FAIL;
}
//read first portion of data from file
readBytes = espfs_fread(file, buf, bufSize);
//check if file is compressed by GZIP and add correspondent header
if (memmem(buf, 3, GZIP_SIGN, 3))
{
httpd_resp_set_hdr(req, "Content-Encoding", "gzip");
httpd_resp_set_hdr(req, "Cache-Control", "max-age=600");
}
//check if the file can contains dynamic variables
if (IS_FILE_EXT(filename, ".html") || IS_FILE_EXT(filename, ".json"))
isDynamicVars = true;
int pt = 0;
do
{
readBytes = 0;
while (pt < fileSize && readBytes < (SCRATCH_BUFSIZE - 64))
int pt = 0;
int preparedBytes = 0;
while (pt < bufSize)
{
if (buf[pt] == '~' && isDynamicVars)
if (buf[pt] == '~' && isDynamicVars) //open tag
{
int k = 0;
char DynVarName[16];
while (pt < fileSize && k < 16 && (buf[++pt] != '~'))
DynVarName[k++] = buf[pt];
if (buf[pt] == '~')
{ //got valid dynamic variable name
DynVarName[k] = 0x00;
readBytes += HTTPPrint(req, &chunk[readBytes], DynVarName);
pt++;
char ch = 0x00;
char DynVarName[MAX_DYNVAR_NAME_LENGTH];
pt++; //skip open tag
while (k < MAX_DYNVAR_NAME_LENGTH)
{
if (pt < bufSize)
{
if (buf[pt] != '~')
DynVarName[k++] = buf[pt++]; //continue extract variable name from buf
else
break; //found close tag
}
else //need read more characters directly from file
{
if (espfs_fread(file, &ch, 1))
{
readBytes++;
if (ch != '~')
DynVarName[k++] = ch; //continue extract variable name from file
else
break; //found close tag
}
else
chunk[readBytes++] = buf[pt++];
//unexpected end of file
goto file_send_error;
}
if (readBytes != 0)
}
if (buf[pt] == '~' || ch == '~') //close tag, got valid dynamic variable name
{
DynVarName[k] = 0x00;
preparedBytes += HTTPPrint(req, &chunk[preparedBytes], DynVarName);
//skip close '~' in buf but not directly in file!
if (ch != '~')
pt++;
}
else
//not found close tag, exit by overflow max variable size or file end
goto file_send_error;
}
else
chunk[preparedBytes++] = buf[pt++]; //write to chunk ordinary character
//check if scratch buffer is full and need send chunk
if (preparedBytes >= (SCRATCH_BUFSIZE - MAX_DYNVAR_LENGTH))
{
/* Send the buffer contents as HTTP response chunk */
#if HTTP_SERVER_DEBUG_LEVEL > 0
ESP_LOGI(TAG, "Write to HTTPserv resp %d", readBytes);
ESP_LOGI(TAG, "Call resp_send_chank because of chunk full. Send %d bytes", preparedBytes);
#endif
if (httpd_resp_send_chunk(req, chunk, readBytes) != ESP_OK)
if (httpd_resp_send_chunk(req, chunk, preparedBytes) != ESP_OK)
goto file_send_error;
preparedBytes = 0;
}
}
//data in buffer is finished and not void, need send chunk
if (preparedBytes)
{
#if HTTP_SERVER_DEBUG_LEVEL > 0
ESP_LOGI(TAG, "Call resp_send_chank because of buf empty. Send %d bytes", preparedBytes);
#endif
if (httpd_resp_send_chunk(req, chunk, preparedBytes) != ESP_OK)
goto file_send_error;
}
//try to read next part of data from file
bufSize = espfs_fread(file, buf, bufSize);
readBytes += bufSize;
}
while (bufSize > 0);
#if HTTP_SERVER_DEBUG_LEVEL > 0
ESP_LOGI(TAG, "File sending complete, read from file %d", readBytes);
#endif
/* Respond with an empty chunk to signal HTTP response completion */
httpd_resp_send_chunk(req, NULL, 0);
free(buf);
espfs_fclose(file);
return ESP_OK;
file_send_error:
ESP_LOGE(TAG, "File sending failed!");
/* Abort sending file */
httpd_resp_sendstr_chunk(req, NULL);
@ -372,21 +455,6 @@ static esp_err_t GETHandler(httpd_req_t *req)
return ESP_FAIL;
}
}
/* Keep looping till the whole file is sent */
}
while (readBytes != 0);
/* Close file after sending complete */
espfs_fclose(file);
#if HTTP_SERVER_DEBUG_LEVEL > 0
ESP_LOGI(TAG, "File sending complete");
#endif
/* Respond with an empty chunk to signal HTTP response completion */
httpd_resp_send_chunk(req, NULL, 0);
free(buf);
return ESP_OK;
}
static httpd_handle_t start_webserver(void)
{
httpd_handle_t server = NULL;