X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/9bce81d175de1bc9aa90a4fbf24e3121ea294fa6..a4243347741f0f7079858e03bca8fc32990f525c:/server/cgi.c

diff --git a/server/cgi.c b/server/cgi.c
deleted file mode 100644
index 095611a..0000000
--- a/server/cgi.c
+++ /dev/null
@@ -1,633 +0,0 @@
-/*
- * This file is part of DisOrder.
- * Copyright (C) 2004, 2005, 2006, 2008 Richard Kettlewell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-
-#include <config.h>
-#include "types.h"
-
-#include <string.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <stddef.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <pcre.h>
-#include <limits.h>
-#include <fnmatch.h>
-#include <ctype.h>
-
-#include "mem.h"
-#include "log.h"
-#include "hex.h"
-#include "charset.h"
-#include "configuration.h"
-#include "table.h"
-#include "syscalls.h"
-#include "kvp.h"
-#include "vector.h"
-#include "split.h"
-#include "inputline.h"
-#include "regsub.h"
-#include "defs.h"
-#include "sink.h"
-#include "cgi.h"
-#include "printf.h"
-#include "mime.h"
-#include "unicode.h"
-
-struct kvp *cgi_args;
-
-/* options */
-struct column {
-  struct column *next;
-  char *name;
-  int ncolumns;
-  char **columns;
-};
-
-#define RELIST(x) struct re *x, **x##_tail = &x
-
-static int have_read_options;
-static struct kvp *labels;
-static struct column *columns;
-
-static void include_options(const char *name);
-
-static void cgi_parse_get(void) {
-  const char *q;
-
-  if(!(q = getenv("QUERY_STRING"))) fatal(0, "QUERY_STRING not set");
-  cgi_args = kvp_urldecode(q, strlen(q));
-}
-
-static void cgi_input(char **ptrp, size_t *np) {
-  const char *cl;
-  char *q;
-  size_t n, m = 0;
-  int r;
-
-  if(!(cl = getenv("CONTENT_LENGTH"))) fatal(0, "CONTENT_LENGTH not set");
-  n = atol(cl);
-  q = xmalloc_noptr(n + 1);
-  while(m < n) {
-    r = read(0, q + m, n - m);
-    if(r > 0)
-      m += r;
-    else if(r == 0)
-      fatal(0, "unexpected end of file reading request body");
-    else switch(errno) {
-    case EINTR: break;
-    default: fatal(errno, "error reading request body");
-    }
-  }
-  if(memchr(q, 0, n)) fatal(0, "null character in request body");
-  q[n + 1] = 0;
-  *ptrp = q;
-  if(np) *np = n;
-}
-
-static int cgi_field_callback(const char *name, const char *value,
-			      void *u) {
-  char *disposition, *pname, *pvalue;
-  char **namep = u;
-
-  if(!strcmp(name, "content-disposition")) {
-    if(mime_rfc2388_content_disposition(value,
-					&disposition,
-					&pname,
-					&pvalue))
-      fatal(0, "error parsing Content-Disposition field");
-    if(!strcmp(disposition, "form-data")
-       && pname
-       && !strcmp(pname, "name")) {
-      if(*namep)
-	fatal(0, "duplicate Content-Disposition field");
-      *namep = pvalue;
-    }
-  }
-  return 0;
-}
-
-static int cgi_part_callback(const char *s,
-			     void attribute((unused)) *u) {
-  char *name = 0;
-  struct kvp *k;
-  
-  if(!(s = mime_parse(s, cgi_field_callback, &name)))
-    fatal(0, "error parsing part header");
-  if(!name) fatal(0, "no name found");
-  k = xmalloc(sizeof *k);
-  k->next = cgi_args;
-  k->name = name;
-  k->value = s;
-  cgi_args = k;
-  return 0;
-}
-
-static void cgi_parse_multipart(const char *boundary) {
-  char *q;
-  
-  cgi_input(&q, 0);
-  if(mime_multipart(q, cgi_part_callback, boundary, 0))
-    fatal(0, "invalid multipart object");
-}
-
-static void cgi_parse_post(void) {
-  const char *ct, *boundary;
-  char *q, *type;
-  size_t n;
-  struct kvp *k;
-
-  if(!(ct = getenv("CONTENT_TYPE")))
-    ct = "application/x-www-form-urlencoded";
-  if(mime_content_type(ct, &type, &k))
-    fatal(0, "invalid content type '%s'", ct);
-  if(!strcmp(type, "application/x-www-form-urlencoded")) {
-    cgi_input(&q, &n);
-    cgi_args = kvp_urldecode(q, n);
-    return;
-  }
-  if(!strcmp(type, "multipart/form-data")) {
-    if(!(boundary = kvp_get(k, "boundary")))
-      fatal(0, "no boundary parameter found");
-    cgi_parse_multipart(boundary);
-    return;
-  }
-  fatal(0, "unrecognized content type '%s'", type);
-}
-
-void cgi_parse(void) {
-  const char *p;
-  struct kvp *k;
-
-  if(!(p = getenv("REQUEST_METHOD"))) fatal(0, "REQUEST_METHOD not set");
-  if(!strcmp(p, "GET"))
-    cgi_parse_get();
-  else if(!strcmp(p, "POST"))
-    cgi_parse_post();
-  else
-    fatal(0, "unknown request method %s", p);
-  for(k = cgi_args; k; k = k->next)
-    if(!utf8_valid(k->name, strlen(k->name))
-       || !utf8_valid(k->value, strlen(k->value)))
-      fatal(0, "invalid UTF-8 sequence in cgi argument");
-}
-
-const char *cgi_get(const char *name) {
-  return kvp_get(cgi_args, name);
-}
-
-void cgi_output(cgi_sink *output, const char *fmt, ...) {
-  va_list ap;
-  int n;
-  char *r;
-
-  va_start(ap, fmt);
-  n = byte_vasprintf(&r, fmt, ap);
-  if(n < 0)
-    fatal(errno, "error calling byte_vasprintf");
-  if(output->quote)
-    r = cgi_sgmlquote(r, 0);
-  output->sink->write(output->sink, r, strlen(r));
-  va_end(ap);
-}
-
-void cgi_header(struct sink *output, const char *name, const char *value) {
-  sink_printf(output, "%s: %s\r\n", name, value);
-}
-
-void cgi_body(struct sink *output) {
-  sink_printf(output, "\r\n");
-}
-
-char *cgi_sgmlquote(const char *s, int raw) {
-  uint32_t *ucs, *p, c;
-  char *b, *bp;
-  int n;
-
-  if(!raw) {
-    if(!(ucs = utf8_to_utf32(s, strlen(s), 0))) exit(EXIT_FAILURE);
-  } else {
-    ucs = xmalloc_noptr((strlen(s) + 1) * sizeof(uint32_t));
-    for(n = 0; s[n]; ++n)
-      ucs[n] = (unsigned char)s[n];
-    ucs[n] = 0;
-  }
-
-  n = 1;
-  /* estimate the length we'll need */
-  for(p = ucs; (c = *p); ++p) {
-    switch(c) {
-    default:
-      if(c > 127 || c < 32) {
-      case '"':
-      case '&':
-      case '<':
-      case '>':
-	n += 12;
-	break;
-      } else
-	n++;
-    }
-  }
-  /* format the string */
-  b = bp = xmalloc_noptr(n);
-  for(p = ucs; (c = *p); ++p) {
-    switch(c) {
-    default:
-      if(*p > 127 || *p < 32) {
-      case '"':
-      case '&':
-      case '<':
-      case '>':
-	bp += sprintf(bp, "&#%lu;", (unsigned long)c);
-	break;
-      } else
-	*bp++ = c;
-    }
-  }
-  *bp = 0;
-  return b;
-}
-
-void cgi_attr(struct sink *output, const char *name, const char *value) {
-  if(!value[strspn(value, "abcdefghijklmnopqrstuvwxyz"
-		   "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-		   "0123456789")])
-    sink_printf(output, "%s=%s", name, value);
-  else
-    sink_printf(output, "%s=\"%s\"", name, cgi_sgmlquote(value, 0));
-}
-
-void cgi_opentag(struct sink *output, const char *name, ...) {
-  va_list ap;
-  const char *n, *v;
-   
-  sink_printf(output, "<%s", name);
-  va_start(ap, name);
-  while((n = va_arg(ap, const char *))) {
-    sink_printf(output, " ");
-    v = va_arg(ap, const char *);
-    if(v)
-      cgi_attr(output, n, v);
-    else
-      sink_printf(output, n);
-  }
-  sink_printf(output, ">");
-}
-
-void cgi_closetag(struct sink *output, const char *name) {
-  sink_printf(output, "</%s>", name);
-}
-
-static int template_open(const char *name,
-			 const char *ext,
-			 const char **filenamep) {
-  const char *dirs[2];
-  int fd = -1, n;
-  char *fullpath;
-
-  dirs[0] = pkgconfdir;
-  dirs[1] = pkgdatadir;
-  if(name[0] == '/') {
-    if((fd = open(name, O_RDONLY)) < 0) fatal(0, "cannot open %s", name);
-    *filenamep = name;
-  } else {
-    for(n = 0; n < config->templates.n + (int)(sizeof dirs / sizeof *dirs); ++n) {
-      byte_xasprintf(&fullpath, "%s/%s%s",
-		     n < config->templates.n ? config->templates.s[n]
-		                             : dirs[n - config->templates.n],
-		     name, ext);
-      if((fd = open(fullpath, O_RDONLY)) >= 0) break;
-    }
-    if(fd < 0) error(0, "cannot find %s%s in template path", name, ext);
-    *filenamep = fullpath;
-  }
-  return fd;
-}
-
-static int valid_template_name(const char *name) {
-  if(strchr(name, '/') || name[0] == '.')
-    return 0;
-  return 1;
-}
-
-void cgi_expand(const char *template,
-		const struct cgi_expansion *expansions,
-		size_t nexpansions,
-		cgi_sink *output,
-		void *u) {
-  int fd = -1;
-  int n;
-  off_t m;
-  char *b;
-  struct stat sb;
-
-  if(!valid_template_name(template))
-    fatal(0, "invalid template name '%s'", template);
-  if((fd = template_open(template, ".html", &template)) < 0)
-    exitfn(EXIT_FAILURE);
-  if(fstat(fd, &sb) < 0) fatal(errno, "cannot stat %s", template);
-  m = 0;
-  b = xmalloc_noptr(sb.st_size + 1);
-  while(m < sb.st_size) {
-    n = read(fd, b + m, sb.st_size - m);
-    if(n > 0) m += n;
-    else if(n == 0) fatal(0, "unexpected EOF reading %s", template);
-    else if(errno != EINTR) fatal(errno, "error reading %s", template);
-  }
-  b[sb.st_size] = 0;
-  xclose(fd);
-  cgi_expand_string(template, b, expansions, nexpansions, output, u);
-}
-
-void cgi_expand_string(const char *name,
-		       const char *template,
-		       const struct cgi_expansion *expansions,
-		       size_t nexpansions,
-		       cgi_sink *output,
-		       void *u) {
-  int braces, n, m, line = 1, sline;
-  char *argname;
-  const char *p;
-  struct vector v;
-  struct dynstr d;
-  cgi_sink parameter_output;
-  
-  while(*template) {
-    if(*template != '@') {
-      p = template;
-      while(*p && *p != '@') {
-	if(*p == '\n') ++line;
-	++p;
-      }
-      output->sink->write(output->sink, template, p - template);
-      template = p;
-      continue;
-    }
-    vector_init(&v);
-    braces = 0;
-    ++template;
-    sline = line;
-    while(*template != '@') {
-      dynstr_init(&d);
-      if(*template == '{') {
-	/* bracketed arg */
-	++template;
-	while(*template && (*template != '}' || braces > 0)) {
-	  switch(*template) {
-	  case '{': ++braces; break;
-	  case '}': --braces; break;
-	  case '\n': ++line; break;
-	  }
-	  dynstr_append(&d, *template++);
-	}
-	if(!*template) fatal(0, "%s:%d: unterminated expansion", name, sline);
-	++template;
-	/* skip whitespace after closing bracket */
-	while(isspace((unsigned char)*template))
-	  ++template;
-      } else {
-	/* unbracketed arg */
-	/* leading whitespace is not significant in unquoted args */
-	while(isspace((unsigned char)*template))
-	  ++template;
-	while(*template
-	      && *template != '@' && *template != '{' && *template != ':') {
-	  if(*template == '\n') ++line;
-	  dynstr_append(&d, *template++);
-	}
-	if(*template == ':')
-	  ++template;
-	if(!*template) fatal(0, "%s:%d: unterminated expansion", name, sline);
-	/* trailing whitespace is not significant in unquoted args */
-	while(d.nvec && (isspace((unsigned char)d.vec[d.nvec - 1])))
-	  --d.nvec;
-      }
-      dynstr_terminate(&d);
-      vector_append(&v, d.vec);
-    }
-    ++template;
-    vector_terminate(&v);
-    /* @@ terminates this file */
-    if(v.nvec == 0)
-      break;
-    if((n = table_find(expansions,
-		       offsetof(struct cgi_expansion, name),
-		       sizeof (struct cgi_expansion),
-		       nexpansions,
-		       v.vec[0])) < 0)
-      fatal(0, "%s:%d: unknown expansion '%s'", name, line, v.vec[0]);
-    if(v.nvec - 1 < expansions[n].minargs)
-      fatal(0, "%s:%d: insufficient arguments to @%s@ (min %d, got %d)",
-	    name, line, v.vec[0], expansions[n].minargs, v.nvec - 1);
-    if(v.nvec - 1 > expansions[n].maxargs)
-      fatal(0, "%s:%d: too many arguments to @%s@ (max %d, got %d)",
-	    name, line, v.vec[0], expansions[n].maxargs, v.nvec - 1);
-    /* for ordinary expansions, recursively expand the arguments */
-    if(!(expansions[n].flags & EXP_MAGIC)) {
-      for(m = 1; m < v.nvec; ++m) {
-	dynstr_init(&d);
-	byte_xasprintf(&argname, "<%s:%d arg #%d>", name, sline, m);
-	parameter_output.quote = 0;
-	parameter_output.sink = sink_dynstr(&d);
-	cgi_expand_string(argname, v.vec[m],
-			  expansions, nexpansions,
-			  &parameter_output, u);
-	dynstr_terminate(&d);
-	v.vec[m] = d.vec;
-      }
-    }
-    expansions[n].handler(v.nvec - 1, v.vec + 1, output, u);
-  }
-}
-
-char *cgi_makeurl(const char *url, ...) {
-  va_list ap;
-  struct kvp *kvp, *k, **kk = &kvp;
-  struct dynstr d;
-  const char *n, *v;
-  
-  dynstr_init(&d);
-  dynstr_append_string(&d, url);
-  va_start(ap, url);
-  while((n = va_arg(ap, const char *))) {
-    v = va_arg(ap, const char *);
-    *kk = k = xmalloc(sizeof *k);
-    kk = &k->next;
-    k->name = n;
-    k->value = v;
-  }
-  *kk = 0;
-  if(kvp) {
-    dynstr_append(&d, '?');
-    dynstr_append_string(&d, kvp_urlencode(kvp, 0));
-  }
-  dynstr_terminate(&d);
-  return d.vec;
-}
-
-void cgi_set_option(const char *name, const char *value) {
-  struct kvp *k = xmalloc(sizeof *k);
-
-  k->next = labels;
-  k->name = name;
-  k->value = value;
-  labels = k;
-}
-
-static void option_label(int attribute((unused)) nvec,
-			 char **vec) {
-  cgi_set_option(vec[0], vec[1]);
-}
-
-static void option_include(int attribute((unused)) nvec,
-			   char **vec) {
-  include_options(vec[0]);
-}
-
-static void option_columns(int nvec,
-			    char **vec) {
-  struct column *c = xmalloc(sizeof *c);
-  
-  c->next = columns;
-  c->name = vec[0];
-  c->ncolumns = nvec - 1;
-  c->columns = &vec[1];
-  columns = c;
-}
-
-static struct option {
-  const char *name;
-  int minargs, maxargs;
-  void (*handler)(int nvec, char **vec);
-} options[] = {
-  { "columns", 1, INT_MAX, option_columns },
-  { "include", 1, 1, option_include },
-  { "label", 2, 2, option_label },
-};
-
-struct read_options_state {
-  const char *name;
-  int line;
-};
-
-static void read_options_error(const char *msg,
-			       void *u) {
-  struct read_options_state *cs = u;
-  
-  error(0, "%s:%d: %s", cs->name, cs->line, msg);
-}
-
-static void include_options(const char *name) {
-  int n, i;
-  int fd;
-  FILE *fp;
-  char **vec, *buffer;
-  struct read_options_state cs;
-
-  if((fd = template_open(name, "", &cs.name)) < 0) return;
-  if(!(fp = fdopen(fd, "r"))) fatal(errno, "error calling fdopen");
-  cs.line = 0;
-  while(!inputline(cs.name, fp, &buffer, '\n')) {
-    ++cs.line;
-    if(!(vec = split(buffer, &n, SPLIT_COMMENTS|SPLIT_QUOTES,
-		     read_options_error, &cs)))
-      continue;
-    if(!n) continue;
-    if((i = TABLE_FIND(options, struct option, name, vec[0])) == -1) {
-      error(0, "%s:%d: unknown option '%s'", cs.name, cs.line, vec[0]);
-      continue;
-    }
-    ++vec;
-    --n;
-    if(n < options[i].minargs) {
-      error(0, "%s:%d: too few arguments to '%s'", cs.name, cs.line, vec[-1]);
-      continue;
-    }
-    if(n > options[i].maxargs) {
-      error(0, "%s:%d: too many arguments to '%s'", cs.name, cs.line, vec[-1]);
-      continue;
-    }
-    options[i].handler(n, vec);
-  }
-  fclose(fp);
-}
-
-static void read_options(void) {
-  if(!have_read_options) {
-    have_read_options = 1;
-    include_options("options");
-  }
-}
-
-const char *cgi_label(const char *key) {
-  const char *label;
-
-  read_options();
-  if(!(label = kvp_get(labels, key))) {
-    /* No label found */
-    if(!strncmp(key, "images.", 7)) {
-      static const char *url_static;
-      /* images.X defaults to <url.static>X.png */
-
-      if(!url_static)
-	url_static = cgi_label("url.static");
-      byte_xasprintf((char **)&label, "%s%s.png", url_static, key + 7);
-    } else if((label = strchr(key, '.')))
-      /* X.Y defaults to Y */
-      ++label;
-    else
-      /* otherwise default to label name */
-      label = key;
-  }
-  return label;
-}
-
-int cgi_label_exists(const char *key) {
-  read_options();
-  return kvp_get(labels, key) ? 1 : 0;
-}
-
-char **cgi_columns(const char *name, int *ncolumns) {
-  struct column *c;
-
-  read_options();
-  for(c = columns; c && strcmp(name, c->name); c = c->next)
-    ;
-  if(c) {
-    if(ncolumns)
-      *ncolumns = c->ncolumns;
-    return c->columns;
-  } else {
-    if(ncolumns)
-      *ncolumns = 0;
-    return 0;
-  }
-}
-
-/*
-Local Variables:
-c-basic-offset:2
-comment-column:40
-End:
-*/