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implemented handle of unlimited size of dynamic variable expand;

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fixed problem appeared when dynamic variable split into two chunk of
data
This commit is contained in:
Bogdan Pilyugin 2022-10-29 14:11:07 +02:00
parent 7a46c36156
commit 0f386c35d0
1 changed files with 60 additions and 53 deletions
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105
src/HTTPServer.c
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@ -251,9 +251,8 @@ static esp_err_t GETHandler(httpd_req_t *req)
espfs_file_t *file;
struct espfs_stat_t stat;
bool isDynamicVars = false;
uint32_t fileSize; //length of file in bytes
uint32_t bufSize;
uint32_t readBytes; //number of bytes, already read from file
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,
@ -308,8 +307,7 @@ static esp_err_t GETHandler(httpd_req_t *req)
/* Retrieve the pointer to scratch buffer for temporary storage */
char *chunk = ((struct file_server_data*) req->user_ctx)->scratch;
fileSize = stat.size;
bufSize = MIN(fileSize, SCRATCH_BUFSIZE - MAX_DYNVAR_LENGTH); //
bufSize = MIN(stat.size, SCRATCH_BUFSIZE - MAX_DYNVAR_LENGTH);
readBytes = 0;
//allocate buffer for file data
char *buf = (char*) malloc(bufSize);
@ -334,12 +332,11 @@ static esp_err_t GETHandler(httpd_req_t *req)
if (IS_FILE_EXT(filename, ".html") || IS_FILE_EXT(filename, ".json"))
isDynamicVars = true;
bool transfComplete = false;
do
{
int pt = 0;
int prcdBytes = 0;
while (pt < bufSize && prcdBytes < (SCRATCH_BUFSIZE))
int preparedBytes = 0;
while (pt < bufSize)
{
if (buf[pt] == '~' && isDynamicVars) //open tag
{
@ -353,10 +350,8 @@ static esp_err_t GETHandler(httpd_req_t *req)
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))
@ -367,36 +362,71 @@ static esp_err_t GETHandler(httpd_req_t *req)
else
break; //found close tag
}
else // end of file
{
break; //error end of file
}
}
}
else
//unexpected end of file
goto file_send_error;
}
}
if (buf[pt] == '~' || ch == '~') //close tag, got valid dynamic variable name
{
DynVarName[k] = 0x00;
prcdBytes += HTTPPrint(req, &chunk[prcdBytes], DynVarName);
preparedBytes += HTTPPrint(req, &chunk[preparedBytes], DynVarName);
//skip close '~' in buf or directly in file
if (ch == '~')
espfs_fread(file, &ch, 1);
else
pt++;
}
else //not found close tag, exit by overflow max variable size or file end
{
else
//not found close tag, exit by overflow max variable size or file end
goto file_send_error;
}
}
else
chunk[prcdBytes++] = buf[pt++]; //ordinary character
}
if (prcdBytes != 0)
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", prcdBytes);
ESP_LOGI(TAG, "Write to HTTPserv resp %d", preparedBytes);
#endif
if (httpd_resp_send_chunk(req, chunk, prcdBytes) != 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, "Write to HTTPserv resp %d", 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);
@ -407,29 +437,6 @@ static esp_err_t GETHandler(httpd_req_t *req)
espfs_fclose(file);
return ESP_FAIL;
}
}
/* Keep looping till the whole file is sent */
int nextPortion;
if((nextPortion = espfs_fread(file, buf, bufSize)))
{
bufSize = nextPortion;
readBytes += nextPortion;
}
else
transfComplete = true;
}
while (!transfComplete);
/* Close file after sending complete */
espfs_fclose(file);
#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);
return ESP_OK;
}
static httpd_handle_t start_webserver(void)
{