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-rw-r--r--doc/tipidee-config.html2
-rw-r--r--doc/tipidee.conf.html45
-rw-r--r--src/config/lexparse.c39
-rw-r--r--src/libtipidee/tipidee_conf_get.c2
-rw-r--r--src/tipideed/responses.c25
-rw-r--r--src/tipideed/tipideed.c19
6 files changed, 111 insertions, 21 deletions
diff --git a/doc/tipidee-config.html b/doc/tipidee-config.html
index c56c248..4e3433d 100644
--- a/doc/tipidee-config.html
+++ b/doc/tipidee-config.html
@@ -108,7 +108,7 @@ static — and that means incompressible RAM. By contrast, a cdb file
is mapped read-only, so its pages are <em>shared clean</em>, which means it's
essentially free. </li>
<li> <a href="tipideed.html">tipideed</a> is exposed to the network. You
-want to its attack surface to be as small as possible. Taking the parsing code
+want its attack surface to be as small as possible. Taking the parsing code
out of it goes a long way &mdash; admittedly, having to parse HTTP in the
first place is more attack surface than a simple config file can ever hope
to be, but every little bit helps. </li>
diff --git a/doc/tipidee.conf.html b/doc/tipidee.conf.html
index 483d9d0..4af3b8b 100644
--- a/doc/tipidee.conf.html
+++ b/doc/tipidee.conf.html
@@ -447,7 +447,7 @@ to clients with the <tt>Content-Type: <em>type</em></tt> header.
<li> Example: <tt>content-type text/html .html .htm</tt> means that files
ending in <tt>.html</tt> or <tt>.htm</tt> should be served as <tt>text/html</tt>.
<li> tipidee already comes with a
-<a href="https://git.skarnet.org/cgi-bin/cgit.cgi/tipidee/tree/src/config/defaults.c#n26">large
+<a href="https://git.skarnet.org/cgi-bin/cgit.cgi/tipidee/tree/src/config/defaults.c#n19">large
list</a> of default Content-Type mappings; this directive should only be necessary if you're
serving files with uncommon extensions or have specific needs. </li>
</ul>
@@ -705,5 +705,48 @@ requests received on port 443). But if you declare a redirection under the
<tt>example.com</tt> domain, it will apply to requests received on <em>any</em> port. </li>
</ul>
+<div id="custom-response">
+<h4> <tt>custom-response</tt> </h4>
+</div>
+
+<p>
+ <code> custom-response <em>status</em> <em>file</em> </code>
+</p>
+
+<ul>
+ <li> <tt>custom-response</tt> allows you to customize the contents of HTTP error
+responses for the current domain. </li>
+ <li> <em>status</em> is the 3-digit HTTP response code you want to specify a custom response for. </li>
+ <li> <em>file</em> is the file containing the body of the HTTP response that will be
+sent to the client if <a href="tipideed.html">tipideed</a> finds that it must answer
+with a <em>status</em> code.
+ <ul>
+ <li> <em>file</em> is used relative to tipideed's working directory (even if
+it is given absolute). It does not have to be under the current domain's document root:
+it is <strong>not a resource</strong>, and is not handled as such.
+However, <em>file</em> cannot go up the filesystem hierarchy: it will always
+be under tipideed's working directory. </li>
+ <li> The Content-Type for <em>file</em> is determined by its extension,
+and mappings you add via <tt>content-type</tt> directives will work. However,
+since <em>file</em> is not a resource, <tt>file-type</tt>
+directives will not work, even if <em>file</em> is under the current virtual
+domain's document root. Don't try to be smart with this. Just name your
+custom files <tt>e404.html</tt> or something. </li>
+ </ul> </li>
+ <li> The instruction is only valid for <em>status</em> responses to requests
+targetting the current domain. You can specify another <tt>custom-response</tt>,
+or even the same one, after the next <tt>domain</tt> directive. </li>
+ <li> An example: <tt>custom-response 404 /errors/404.html</tt> under
+a <tt>domain example.com</tt> line will mean that the <tt>errors/404.html</tt>
+file will be served as the text/html body of any "404 Not Found" response
+tipideed may send to requests addressed to <tt>example.com</tt>. The
+<tt>errors</tt> subdirectory is at the same level as the <tt>example.com</tt>
+subdirectory. </li>
+ <li> If tipideed cannot open <em>file</em>, it will log a warning message
+and answer the client with a basic builtin response. </li>
+ <li> Not every HTTP status code is used by tipideed. Nothing will happen
+if you define custom responses for codes that aren't used. </li>
+</ul>
+
</body>
</html>
diff --git a/src/config/lexparse.c b/src/config/lexparse.c
index d7d9e1b..88a9157 100644
--- a/src/config/lexparse.c
+++ b/src/config/lexparse.c
@@ -55,7 +55,8 @@ enum token_e
T_NONNPH,
T_BASICAUTH,
T_NOAUTH,
- T_FILETYPE
+ T_FILETYPE,
+ T_CUSTOMRESPONSE
} ;
struct directive_s
@@ -200,7 +201,7 @@ static inline void parse_redirect (char const *s, size_t const *word, size_t n,
if (!domain)
strerr_dief6x(1, "redirection", " without a domain directive", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
if (s[word[0]] != '/')
- strerr_dief5x(1, "redirected resource must start with /", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ strerr_dief6x(1, "redirected resource", " must start with /", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
if (!uint320_scan(s + word[1], &code))
strerr_dief6x(1, "invalid redirection code ", s + word[1], " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
for (; i < 4 ; i++) if (code == codes[i]) break ;
@@ -237,7 +238,7 @@ static void parse_bitattr (char const *s, size_t const *word, size_t n, char con
if (!domain)
strerr_dief7x(1, "resource attribute ", "definition", " without a domain directive", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
if (s[*word] != '/')
- strerr_dief5x(1, "resource must start with /", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ strerr_dief6x(1, "resource", " must start with /", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
{
confnode const *oldnode ;
size_t arglen = strlen(s + *word) ;
@@ -279,7 +280,7 @@ static inline void parse_filetype (char const *s, size_t const *word, size_t n,
if (!domain)
strerr_dief7x(1, "file-type", " definition", " without a domain directive", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
if (s[word[0]] != '/')
- strerr_dief5x(1, "resource must start with /", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ strerr_dief6x(1, "resource", " must start with /", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
{
confnode const *oldnode ;
size_t arglen = strlen(s + word[0]) ;
@@ -321,6 +322,32 @@ static inline void parse_filetype (char const *s, size_t const *word, size_t n,
}
}
+static inline void parse_customresponse (char const *s, size_t const *word, size_t n, char const *domain, size_t domainlen, mdt const *md)
+{
+ uint32_t status ;
+ size_t word1, len ;
+ char key[7 + domainlen] ;
+
+ if (n != 2)
+ strerr_dief8x(1, "too ", n > 2 ? "many" : "few", " arguments to directive ", "custom-response", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ if (!domain)
+ strerr_dief7x(1, "custom-response", " definition", " without a domain directive", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ if (!uint320_scan(s + word[0], &status) || status < 100 || status > 999)
+ strerr_dief6x(1, "invalid status", " for custom-response", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ word1 = word[1] ;
+ while (s[word1] == '/') word1++ ;
+ len = strlen(s + word1) ;
+ if (!len || !strncmp(s + word1, "../", 3) || strstr(s + word1, "/../") || (len >= 3 && !strcmp(s + word1 + len - 3, "/..")))
+ strerr_dief6x(1, "invalid file", " for custom-response", " in file ", g.storage.s + md->filepos, " line ", md->linefmt) ;
+ key[0] = 'E' ;
+ key[1] = ':' ;
+ uint32_fmt(key + 2, status) ;
+ key[5] = ':' ;
+ memcpy(key + 6, domain, domainlen) ;
+ key[6 + domainlen] = 0 ;
+ add_unique(key, s + word1, len + 1, md) ;
+}
+
static inline void process_line (char const *s, size_t const *word, size_t n, stralloc *domain, mdt *md)
{
static struct directive_s const directives[] =
@@ -329,6 +356,7 @@ static inline void process_line (char const *s, size_t const *word, size_t n, st
{ .s = "basic-auth", .token = T_BASICAUTH },
{ .s = "cgi", .token = T_CGI },
{ .s = "content-type", .token = T_CONTENTTYPE },
+ { .s = "custom-response", .token = T_CUSTOMRESPONSE },
{ .s = "domain", .token = T_DOMAIN },
{ .s = "file-type", .token = T_FILETYPE },
{ .s = "global", .token = T_GLOBAL },
@@ -420,6 +448,9 @@ static inline void process_line (char const *s, size_t const *word, size_t n, st
case T_FILETYPE :
parse_filetype(s, word, n, domain->s, domain->len, md) ;
break ;
+ case T_CUSTOMRESPONSE :
+ parse_customresponse(s, word, n, domain->s, domain->len, md) ;
+ break ;
}
}
diff --git a/src/libtipidee/tipidee_conf_get.c b/src/libtipidee/tipidee_conf_get.c
index 2c96d2b..b056fd6 100644
--- a/src/libtipidee/tipidee_conf_get.c
+++ b/src/libtipidee/tipidee_conf_get.c
@@ -4,12 +4,14 @@
#include <string.h>
#include <skalibs/cdb.h>
+#include <skalibs/lolstdio.h>
#include <tipidee/conf.h>
int tipidee_conf_get (tipidee_conf const *conf, char const *key, cdb_data *data)
{
size_t keylen = strlen(key) ;
+ LOLDEBUG("tipidee_conf_get: looking up %s", key) ;
if (keylen > TIPIDEE_CONF_KEY_MAXLEN) return (errno = EINVAL, 0) ;
switch (cdb_find(&conf->c, data, key, keylen))
{
diff --git a/src/tipideed/responses.c b/src/tipideed/responses.c
index 0d0840c..70dcddf 100644
--- a/src/tipideed/responses.c
+++ b/src/tipideed/responses.c
@@ -8,6 +8,7 @@
#include <skalibs/types.h>
#include <skalibs/buffer.h>
#include <skalibs/strerr.h>
+#include <skalibs/stralloc.h>
#include <skalibs/tai.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-timed.h>
@@ -37,7 +38,14 @@ void response_error (tipidee_rql const *rql, char const *docroot, unsigned int s
{
tain deadline ;
tipidee_defaulttext dt ;
- char const *file = tipidee_conf_get_errorfile(&g.conf, docroot, status) ;
+ char const *file ;
+ size_t salen = g.sa.len ;
+ if (sarealpath(&g.sa, docroot) == -1 || !stralloc_0(&g.sa))
+ die500sys(rql, 111, docroot, "realpath ", docroot) ;
+ if (strncmp(g.sa.s + salen, g.sa.s, g.cwdlen) || g.sa.s[salen + g.cwdlen] != '/')
+ die500x(rql, 102, docroot, "docroot ", docroot, " points outside of the server's root") ;
+ file = tipidee_conf_get_errorfile(&g.conf, g.sa.s + salen + g.cwdlen + 1, status) ;
+ g.sa.len = salen ;
if (!tipidee_util_defaulttext(status, &dt))
{
char fmt[UINT_FMT] ;
@@ -47,20 +55,27 @@ void response_error (tipidee_rql const *rql, char const *docroot, unsigned int s
if (file)
{
- int fd = open_read(file) ;
- if (fd == -1) strerr_warnwu3sys("open ", "custom error file ", file) ;
+ int fd ;
+ if (file[0] == '/')
+ {
+ char fmt[UINT_FMT] ;
+ fmt[uint_fmt(fmt, status)] = 0 ;
+ strerr_dief4x(102, "bad configuration: absolute path for custom ", fmt, " file: ", file) ;
+ }
+ fd = open_read(file) ;
+ if (fd == -1) strerr_warnwu3sys("open ", "custom response file ", file) ;
else
{
struct stat st ;
if (fstat(fd, &st) == -1)
{
fd_close(fd) ;
- strerr_warnwu3sys("stat ", "custom error file ", file) ;
+ strerr_warnwu3sys("stat ", "custom response file ", file) ;
}
else if (!S_ISREG(st.st_mode))
{
fd_close(fd) ;
- strerr_warnw3x("custom error file ", file, " is not a regular file") ;
+ strerr_warnw3x("custom response file ", file, " is not a regular file") ;
}
else
{
diff --git a/src/tipideed/tipideed.c b/src/tipideed/tipideed.c
index b004782..b499b2a 100644
--- a/src/tipideed/tipideed.c
+++ b/src/tipideed/tipideed.c
@@ -195,18 +195,17 @@ static inline unsigned int indexify (tipidee_rql const *rql, char const *docroot
static inline void get_resattr (tipidee_rql const *rql, char const *docroot, char const *res, tipidee_resattr *ra)
{
- static stralloc sa = STRALLOC_ZERO ;
- sa.len = 0 ;
- if (sarealpath(&sa, res) == -1 || !stralloc_0(&sa)) die500sys(rql, 111, docroot, "realpath ", res) ;
- if (strncmp(sa.s, g.sa.s, g.cwdlen) || sa.s[g.cwdlen] != '/')
+ size_t pos = g.sa.len ;
+ if (sarealpath(&g.sa, res) == -1 || !stralloc_0(&g.sa)) die500sys(rql, 111, docroot, "realpath ", res) ;
+ if (strncmp(g.sa.s + pos, g.sa.s, g.cwdlen) || g.sa.s[pos + g.cwdlen] != '/')
die500x(rql, 102, docroot, "resource ", res, " points outside of the server's root") ;
{
char const *attr = 0 ;
- size_t len = sa.len - g.cwdlen + 1 ;
+ size_t len = g.sa.len - pos - g.cwdlen + 1 ;
char key[len + 1] ;
key[0] = 'A' ; key[1] = ':' ;
- memcpy(key + 2, sa.s + 1 + g.cwdlen, sa.len - 1 - g.cwdlen) ;
+ memcpy(key + 2, g.sa.s + pos + 1 + g.cwdlen, len - 2) ;
key[len] = '/' ;
errno = ENOENT ;
while (!attr)
@@ -233,18 +232,18 @@ static inline void get_resattr (tipidee_rql const *rql, char const *docroot, cha
nphprefix = tipidee_conf_get_string(&g.conf, key) ;
if (nphprefix)
{
- char const *base = strrchr(sa.s + g.cwdlen, '/') ;
+ char const *base = strrchr(g.sa.s + pos + g.cwdlen, '/') ;
if (str_start(base + 1, nphprefix)) ra->isnph = 1 ;
}
}
}
}
-
if (!ra->iscgi && !ra->content_type)
{
- ra->content_type = tipidee_conf_get_content_type(&g.conf, sa.s + g.cwdlen) ;
- if (!ra->content_type) die500sys(rql, 111, docroot, "get content type for ", sa.s + g.cwdlen) ;
+ ra->content_type = tipidee_conf_get_content_type(&g.conf, g.sa.s + pos + g.cwdlen) ;
+ if (!ra->content_type) die500sys(rql, 111, docroot, "get content type for ", g.sa.s + pos + g.cwdlen) ;
}
+ g.sa.len = pos ;
}
static inline void force_redirect (tipidee_rql const *rql, char const *fn)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 02:44:50 +0000