From a3b38459ad95612fff68c763897d83d9da0c1448 Mon Sep 17 00:00:00 2001 From: cskarai Date: Tue, 20 Sep 2016 19:52:19 +0200 Subject: [PATCH] Added comments to cgiwebserversetup --- esp-link/cgiwebserversetup.c | 46 +++++++++++++++++++++--------------- 1 file changed, 27 insertions(+), 19 deletions(-) diff --git a/esp-link/cgiwebserversetup.c b/esp-link/cgiwebserversetup.c index 19bc1c5..2a25950 100644 --- a/esp-link/cgiwebserversetup.c +++ b/esp-link/cgiwebserversetup.c @@ -9,28 +9,31 @@ #include "config.h" #include "web-server.h" -int html_offset = 0; -int html_header_len = 0; +int upload_offset = 0; // flash offset where to store page upload +int html_header_len = 0; // HTML header length (for uploading HTML files) + +// this is the header to add if user uploads HTML file const char * HTML_HEADER = "esp-link" "" "
"; +// multipart callback for uploading user defined pages int ICACHE_FLASH_ATTR webServerSetupMultipartCallback(MultipartCmd cmd, char *data, int dataLen, int position) { switch(cmd) { case FILE_START: - html_offset = 0; + upload_offset = 0; html_header_len = 0; // simple HTML file - if( ( dataLen > 5 ) && ( os_strcmp(data + dataLen - 5, ".html") == 0 ) ) + if( ( dataLen > 5 ) && ( os_strcmp(data + dataLen - 5, ".html") == 0 ) ) // if the file ends with .html, wrap into an espfs image { // write the start block on esp-fs int spi_flash_addr = getUserPageSectionStart(); spi_flash_erase_sector(spi_flash_addr/SPI_FLASH_SEC_SIZE); EspFsHeader hdr; - hdr.magic = 0xFFFFFFFF; + hdr.magic = 0xFFFFFFFF; // espfs magic is invalid during upload hdr.flags = 0; hdr.compression = 0; @@ -41,25 +44,25 @@ int ICACHE_FLASH_ATTR webServerSetupMultipartCallback(MultipartCmd cmd, char *da hdr.nameLen = len; hdr.fileLenComp = hdr.fileLenDecomp = 0xFFFFFFFF; - spi_flash_write( spi_flash_addr + html_offset, (uint32_t *)(&hdr), sizeof(EspFsHeader) ); - html_offset += sizeof(EspFsHeader); + spi_flash_write( spi_flash_addr + upload_offset, (uint32_t *)(&hdr), sizeof(EspFsHeader) ); + upload_offset += sizeof(EspFsHeader); char nameBuf[len]; os_memset(nameBuf, 0, len); os_memcpy(nameBuf, data, dataLen); - spi_flash_write( spi_flash_addr + html_offset, (uint32_t *)(nameBuf), len ); - html_offset += len; + spi_flash_write( spi_flash_addr + upload_offset, (uint32_t *)(nameBuf), len ); + upload_offset += len; html_header_len = os_strlen(HTML_HEADER) & ~3; // upload only 4 byte aligned part char buf[html_header_len]; os_memcpy(buf, HTML_HEADER, html_header_len); - spi_flash_write( spi_flash_addr + html_offset, (uint32_t *)(buf), html_header_len ); - html_offset += html_header_len; + spi_flash_write( spi_flash_addr + upload_offset, (uint32_t *)(buf), html_header_len ); + upload_offset += html_header_len; } break; case FILE_DATA: - if(( position < 4 ) && (html_offset == 0)) + if(( position < 4 ) && (upload_offset == 0)) // for espfs images check the magic number { for(int p = position; p < 4; p++ ) { @@ -68,11 +71,11 @@ int ICACHE_FLASH_ATTR webServerSetupMultipartCallback(MultipartCmd cmd, char *da os_printf("Not an espfs image!\n"); return 1; } - data[p - position] = 0xFF; // clean espfs magic to mark as invalid + data[p - position] = 0xFF; // espfs magic is invalid during upload } } - int spi_flash_addr = getUserPageSectionStart() + html_offset + position; + int spi_flash_addr = getUserPageSectionStart() + upload_offset + position; int spi_flash_end_addr = spi_flash_addr + dataLen; if( spi_flash_end_addr + dataLen >= getUserPageSectionEnd() ) { @@ -100,10 +103,10 @@ int ICACHE_FLASH_ATTR webServerSetupMultipartCallback(MultipartCmd cmd, char *da break; case FILE_DONE: { - if( html_offset != 0 ) + if( html_header_len != 0 ) { // write the terminating block on esp-fs - int spi_flash_addr = getUserPageSectionStart() + html_offset + position; + int spi_flash_addr = getUserPageSectionStart() + upload_offset + position; uint32_t pad = 0; uint8_t pad_cnt = (4 - position) & 3; @@ -112,8 +115,9 @@ int ICACHE_FLASH_ATTR webServerSetupMultipartCallback(MultipartCmd cmd, char *da spi_flash_addr += pad_cnt; + // create ESPFS image EspFsHeader hdr; - hdr.magic = ESPFS_MAGIC; + hdr.magic = ESPFS_MAGIC; hdr.flags = 1; hdr.compression = 0; hdr.nameLen = 0; @@ -123,24 +127,28 @@ int ICACHE_FLASH_ATTR webServerSetupMultipartCallback(MultipartCmd cmd, char *da uint32_t totallen = html_header_len + position; + // restore ESPFS magic spi_flash_write( (int)getUserPageSectionStart(), (uint32_t *)&hdr.magic, sizeof(uint32_t) ); + // set file size spi_flash_write( (int)getUserPageSectionStart() + 8, &totallen, sizeof(uint32_t) ); spi_flash_write( (int)getUserPageSectionStart() + 12, &totallen, sizeof(uint32_t) ); } else { + // set espfs magic (set it valid) uint32_t magic = ESPFS_MAGIC; spi_flash_write( (int)getUserPageSectionStart(), (uint32_t *)&magic, sizeof(uint32_t) ); } - WEB_Init(); + WEB_Init(); // reload the content } break; } return 0; } -MultipartCtx * webServerContext = NULL; +MultipartCtx * webServerContext = NULL; // multipart upload context for web server +// this callback is called when user uploads the web-page int ICACHE_FLASH_ATTR cgiWebServerSetupUpload(HttpdConnData *connData) { if( webServerContext == NULL )