ref: a1fceabd5ba5f54d7a54a8bfa9138230f2372267
dir: /sys/src/libhttpd/fail.c/
#include <u.h>
#include <libc.h>
#include <bin.h>
#include <httpd.h>
typedef struct Error Error;
struct Error
{
char *num;
char *concise;
char *verbose;
};
Error errormsg[] =
{
[HInternal] {"500 Internal Error", "Internal Error",
"This server could not process your request due to an internal error."},
[HTempFail] {"500 Internal Error", "Temporary Failure",
"The object %s is currently inaccessible.<p>Please try again later."},
[HUnimp] {"501 Not implemented", "Command not implemented",
"This server does not implement the %s command."},
[HUnkVers] {"501 Not Implemented", "Unknown http version",
"This server does not know how to respond to http version %s."},
[HBadCont] {"501 Not Implemented", "Impossible format",
"This server cannot produce %s in any of the formats your client accepts."},
[HBadReq] {"400 Bad Request", "Strange Request",
"Your client sent a query that this server could not understand."},
[HSyntax] {"400 Bad Request", "Garbled Syntax",
"Your client sent a query with incoherent syntax."},
[HBadSearch] {"400 Bad Request", "Inapplicable Search",
"Your client sent a search that cannot be applied to %s."},
[HNotFound] {"404 Not Found", "Object not found",
"The object %s does not exist on this server."},
[HNoSearch] {"403 Forbidden", "Search not supported",
"The object %s does not support the search command."},
[HNoData] {"403 Forbidden", "No data supplied",
"Search or forms data must be supplied to %s."},
[HExpectFail] {"403 Expectation Failed", "Expectation Failed",
"This server does not support some of your request's expectations."},
[HUnauth] {"403 Forbidden", "Forbidden",
"You are not allowed to see the object %s."},
[HOK] {"200 OK", "everything is fine"},
};
/*
* write a failure message to the net and exit
*/
int
hfail(HConnect *c, int reason, ...)
{
Hio *hout;
char makeup[HBufSize], err[ERRMAX];
va_list arg;
int n;
rerrstr(err, sizeof err);
hout = &c->hout;
va_start(arg, reason);
vseprint(makeup, makeup+HBufSize, errormsg[reason].verbose, arg);
va_end(arg);
/*
* this additional information has proved useful when debugging
* complex http configuration problems.
*/
n = snprint(c->xferbuf, HBufSize, "<head><title>%s</title></head>\n"
"<body><h1>%s</h1>\n%s<p>\n"
"errstr: %s<br>\n"
"uri host: %s<br>\n"
"header host: %s<br>\nactual host: %s\n</body>\n",
errormsg[reason].concise, errormsg[reason].concise, makeup,
err,
(c->req.urihost? c->req.urihost: ""),
c->head.host, hmydomain);
hprint(hout, "%s %s\r\n", hversion, errormsg[reason].num);
hprint(hout, "Date: %D\r\n", time(nil));
hprint(hout, "Server: Plan9\r\n");
hprint(hout, "Content-Type: text/html\r\n");
hprint(hout, "Content-Length: %d\r\n", n);
if(c->head.closeit)
hprint(hout, "Connection: close\r\n");
else if(!http11(c))
hprint(hout, "Connection: Keep-Alive\r\n");
hprint(hout, "\r\n");
if(c->req.meth == nil || strcmp(c->req.meth, "HEAD") != 0)
hwrite(hout, c->xferbuf, n);
if(c->replog)
c->replog(c, "Reply: %s\nReason: %s\n", errormsg[reason].num, errormsg[reason].concise);
return hflush(hout);
}