📄 http.c
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// ***************************************************************************// An 8051 Based Web Server// http.c: HTTP protocol processing// By Mason Kidd 4/24/02// ***************************************************************************#include <string.h>#include "packets.h"#include "tcp.h"#include "http.h"void http_response();void http_error(int nStatus, char *szTitle, char *szText);void http_header(int nStatus, char *szTitle, int nLength);unsigned char szBuf[500];unsigned char *pszBuf = szBuf;unsigned char cTCB = 0;void tx_http_packet(unsigned char *szData, unsigned char nLength){ tx_tcp_packet(cTCB, 0, szData, nLength);}void rx_http_packet(unsigned char *szData, unsigned char nLength, unsigned char current_TCB){ unsigned char method[5], path[100], protocol[10]; char *file; int nFileLength; pszBuf = szBuf; cTCB = current_TCB; if (sscanf(szData, "%[^ ] %[^ ] %[^\r]", method, path, protocol) != 3) http_error(400, "Bad Request", "Unable to prarse request."); if (strcasecmp(method, "get") != 0) http_error(501, "Not Implemented", "That method is not implemented."); if (path[0] != '/') http_error(400, "Bad Request", "Bad filename."); file = &(path[1]); nFileLength = strlen(file); if (nFileLength == 0) http_response(); else if ((strcasecmp(file, "index.html") == 0) || (strcasecmp(file, "index.htm") == 0)) http_response(); else http_error(404, "Not Found", "File not found.");}void http_response(){ http_header(200, "Ok", -1); pszBuf += sprintf(szBuf, "<html><head><title>%s</title></head>", _HTTP_SERVER); pszBuf += sprintf(szBuf, "<body>The current temperature is %d degrees Fahrenheit</body></html>", 20); tx_http_packet(szBuf, strlen(szBuf));}void http_error(int nStatus, char *szTitle, char *szText){ http_header(nStatus, szTitle, -1); pszBuf += sprintf(szBuf, "<html><head><title>%s</title></head>", szTitle); pszBuf += sprintf(szBuf, "<body>%s</body></html>", szText);}void http_header(int nStatus, char *szTitle, int nLength){ pszBuf += sprintf(szBuf, "%s %d %s\r\n", _HTTP_PROTOCOL, nStatus, szTitle); pszBuf += sprintf(szBuf, "Server: %s\r\n", _HTTP_SERVER); pszBuf += sprintf(szBuf, "Connection: close\r\n"); pszBuf += sprintf(szBuf, "Content-Type: text/html\r\n"); if (nLength > 0) pszBuf += sprintf(szBuf, "Content-Length: %d\r\n", nLength); pszBuf += sprintf(szBuf, "\r\n");}⌨️ 快捷键说明
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