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67 lines
2.4 KiB
67 lines
2.4 KiB
#include "httpd.h"
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#include "httpd-logging.h"
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#include "httpd-heap.h"
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//Use this as a cgi function to redirect one url to another.
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httpd_cgi_state cgiRedirect(HttpdConnData *connData)
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{
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if (connData->conn == NULL) {
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//Connection aborted. Clean up.
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return HTTPD_CGI_DONE;
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}
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httpdRedirect(connData, (char *) connData->cgiArg);
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return HTTPD_CGI_DONE;
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}
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//Used to spit out a 404 error
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httpd_cgi_state cgiNotFound(HttpdConnData *connData)
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{
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if (connData->conn == NULL) { return HTTPD_CGI_DONE; }
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httpdStartResponse(connData, 404);
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httpdEndHeaders(connData);
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httpdSendStr(connData, "404 File not found.");
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return HTTPD_CGI_DONE;
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}
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//This CGI function redirects to a fixed url of http://[hostname]/ if hostname field of request isn't
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//already that hostname. Use this in combination with a DNS server that redirects everything to the
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//ESP in order to load a HTML page as soon as a phone, tablet etc connects to the ESP. Watch out:
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//this will also redirect connections when the ESP is in STA mode, potentially to a hostname that is not
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//in the 'official' DNS and so will fail.
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httpd_cgi_state cgiRedirectToHostname(HttpdConnData *connData)
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{
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static const char hostFmt[] = "http://%s/";
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char *buff;
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int isIP = 0;
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if (connData->conn == NULL) {
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//Connection aborted. Clean up.
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return HTTPD_CGI_DONE;
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}
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if (connData->hostName == NULL) {
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http_warn("Huh? No hostname.");
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return HTTPD_CGI_NOTFOUND;
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}
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//Quick and dirty code to see if host is an IP
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if (strlen(connData->hostName) > 8) {
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isIP = 1;
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for (size_t x = 0; x < strlen(connData->hostName); x++) {
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if (connData->hostName[x] != '.' && (connData->hostName[x] < '0' || connData->hostName[x] > '9')) { isIP = 0; }
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}
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}
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if (isIP) { return HTTPD_CGI_NOTFOUND; }
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//Check hostname; pass on if the same
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if (strcmp(connData->hostName, (char *) connData->cgiArg) == 0) { return HTTPD_CGI_NOTFOUND; }
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//Not the same. Redirect to real hostname.
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buff = httpdMalloc(strlen((char *) connData->cgiArg) + sizeof(hostFmt));
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if (buff == NULL) {
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//Bail out
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return HTTPD_CGI_DONE;
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}
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sprintf(buff, hostFmt, (char *) connData->cgiArg);
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http_info("Redirecting to hostname url %s", buff);
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httpdRedirect(connData, buff);
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httpdFree(buff);
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return HTTPD_CGI_DONE;
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}
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