#include "regsub.h"
#include "defs.h"
#include "sink.h"
-#include "cgi.h"
+#include "server-cgi.h"
#include "printf.h"
#include "mime.h"
#include "unicode.h"
const char *value;
};
-static hash *cgi_macros;
-
-/** @brief Parse of a template */
-struct cgi_element {
- /** @brief Next element */
- struct cgi_element *next;
-
- /** @brief Element type */
- int type;
-#define ELEMENT_TEXT 0
-#define ELEMENT_EXPANSION 1
-
- /** @brief Line number at start of element */
- int line;
-
- /** @brief Plain text */
- char *text;
-
- /** @brief Expansion name */
- char *name;
-
- /** @brief Argument count */
- int nargs;
-
- /** @brief Argument values (NOT recursively expanded) */
- char **args;
-};
-
#define RELIST(x) struct re *x, **x##_tail = &x
static int have_read_options;
struct cgi_element *head,
const struct cgi_expansion *expansions,
size_t nexpansions,
- cgi_sink *output,
+ cgi_1sink *output,
void *u);
-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);
}
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);
-}
-
-/** @brief Return a linked list of the parse of @p template */
-static struct cgi_element *cgi_parse_string(const char *name,
- const char *template) {
- int braces, line = 1, sline;
- const char *p;
- struct vector v;
- struct dynstr d;
- struct cgi_element *head = 0, **tailp = &head, *e;
-
- while(*template) {
- if(*template != '@') {
- sline = line;
- dynstr_init(&d);
- /* Gather up text without any expansions in. */
- while(*template && *template != '@') {
- if(*template == '\n')
- ++line;
- dynstr_append(&d, *template++);
- }
- dynstr_terminate(&d);
- e = xmalloc(sizeof *e);
- e->next = 0;
- e->line = sline;
- e->type = ELEMENT_TEXT;
- e->text = d.vec;
- *tailp = e;
- tailp = &e->next;
- continue;
- }
- vector_init(&v);
- braces = 0;
- p = template;
- ++template;
- sline = line;
- while(*template != '@') {
- /* Skip whitespace */
- while(isspace((unsigned char)*template))
- ++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 '%.*s'",
- name, sline, (int)(template - p), p);
- ++template;
- if(isspace((unsigned char)*template)) {
- /* We have @{...}<WHITESPACE><SOMETHING> */
- for(p = template; isspace((unsigned char)*p); ++p)
- ;
- /* Now we are looking at <SOMETHING>. If it's "{" then that
- * must be the next argument. Otherwise we infer that this
- * is really the end of the expansion. */
- if(*p != '{')
- goto finished_expansion;
- }
- } else {
- /* unbracketed arg */
- while(*template
- && *template != '@' && *template != '{' && *template != ':') {
- if(*template == '\n') ++line;
- dynstr_append(&d, *template++);
- }
- if(*template == ':')
- ++template;
- if(!*template) fatal(0, "%s:%d: unterminated expansion '%.*s'",
- name, sline, (int)(template - p), p);
- /* 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;
- finished_expansion:
- vector_terminate(&v);
- /* @@ terminates this file */
- if(v.nvec == 0)
- break;
- e = xmalloc(sizeof *e);
- e->next = 0;
- e->line = sline;
- e->type = ELEMENT_EXPANSION;
- e->name = v.vec[0];
- e->nargs = v.nvec - 1;
- e->args = &v.vec[1];
- *tailp = e;
- tailp = &e->next;
- }
- return head;
-}
-
-void cgi_expand_string(const char *name,
- const char *template,
- const struct cgi_expansion *expansions,
- size_t nexpansions,
- cgi_sink *output,
- void *u) {
- cgi_expand_parsed(name, cgi_parse_string(name, template),
- expansions, nexpansions, output, u);
-}
-
-/** @brief Expand a list of arguments in place */
-static void cgi_expand_all_args(const char *name,
- int line,
- const struct cgi_expansion *expansions,
- size_t nexpansions,
- void *u,
- char **args,
- int nargs) {
- int n;
- struct dynstr d;
- char *argname;
- cgi_sink parameter_output;
-
- for(n = 0; n < nargs; ++n) {
- dynstr_init(&d);
- byte_xasprintf(&argname, "<%s:%d arg #%d>", name, line,n);
- parameter_output.quote = 0;
- parameter_output.sink = sink_dynstr(&d);
- cgi_expand_string(argname, args[n],
- expansions, nexpansions,
- ¶meter_output, u);
- dynstr_terminate(&d);
- args[n] = d.vec;
- }
-}
-
-
-/** @brief Substitute macro arguments in place */
-static void cgi_substitute_args(const char *name,
- struct cgi_element *head,
- const struct cgi_macro *macro,
- char **values) {
- struct cgi_element *e;
- int n;
-
- for(e = head; e; e = e->next) {
- if(e->type != ELEMENT_EXPANSION)
- continue;
- /* See if this is an argument name */
- for(n = 0; n < macro->nargs; ++n)
- if(!strcmp(e->name, macro->args[n]))
- break;
- if(n < macro->nargs) {
- /* It is! */
- if(e->nargs != 0)
- fatal(0, "%s:%d: macro argument (%s) cannot take parameters",
- name, e->line, e->name);
- /* Replace it with the argument text */
- e->type = ELEMENT_TEXT;
- e->text = values[n];
- continue;
- }
- /* It's not a macro argument. We must recurse into its arguments to
- * substitute the macro arguments. */
- /* TODO */
- /* In order to do this we must parse it and our callers must expect the
- * parsed form. We're not ready for this yet... */
- }
-}
-
-static void cgi_expand_parsed(const char *name,
- struct cgi_element *head,
- const struct cgi_expansion *expansions,
- size_t nexpansions,
- cgi_sink *output,
- void *u) {
- int n;
- const struct cgi_macro *macro;
- struct cgi_element *e, *macro_head;
-
- for(e = head; e; e = e->next) {
- switch(e->type) {
- case ELEMENT_TEXT:
- output->sink->write(output->sink, e->text, strlen(e->text));
- break;
- case ELEMENT_EXPANSION:
- if((n = table_find(expansions,
- offsetof(struct cgi_expansion, name),
- sizeof (struct cgi_expansion),
- nexpansions,
- e->name)) >= 0) {
- /* We found a built-in */
- if(e->nargs < expansions[n].minargs)
- fatal(0, "%s:%d: insufficient arguments to @%s@ (min %d, got %d)",
- name, e->line, e->name, expansions[n].minargs, e->nargs);
- if(e->nargs > expansions[n].maxargs)
- fatal(0, "%s:%d: too many arguments to @%s@ (max %d, got %d)",
- name, e->line, e->name, expansions[n].maxargs, e->nargs);
- /* for ordinary expansions, recursively expand the arguments */
- if(!(expansions[n].flags & EXP_MAGIC))
- cgi_expand_all_args(name, e->line, expansions, nexpansions, u,
- e->args, e->nargs);
- expansions[n].handler(e->nargs, e->args, output, u);
- } else if(cgi_macros && (macro = hash_find(cgi_macros, e->name))) {
- /* We found a macro */
- if(e->nargs != macro->nargs)
- fatal(0, "%s:%d: wrong number of arguments to @%s@ (need %d, got %d)",
- name, e->line, e->name, macro->nargs, e->nargs);
- /* Expand arguments */
- cgi_expand_all_args(name, e->line, expansions, nexpansions, u,
- e->args, e->nargs);
- /* Parse the macro value. Doing this every time isn't very efficient,
- * but NB that we mess with the result of the parse, so for the time
- * being we do need to do it. */
- macro_head = cgi_parse_string(e->name, macro->value);
- /* Substitute in argument values */
- cgi_substitute_args(name, macro_head, macro, e->args);
- /* Expand the result */
- cgi_expand_parsed(e->name,
- macro_head,
- expansions,
- nexpansions,
- output,
- u);
- } else {
- /* Totally undefined */
- fatal(0, "%s:%d: unknown expansion '%s'", name, e->line, e->name);
- }
- break;
- }
- }
-}
-
-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;
}
}
-void cgi_define(const char *name,
- int nargs,
- char **args,
- const char *value) {
- struct cgi_macro m;
-
- if(!cgi_macros)
- cgi_macros = hash_new(sizeof(struct cgi_macro));
- m.nargs = nargs;
- m.args = args;
- m.value = value;
- hash_add(cgi_macros, name, &m, HASH_INSERT_OR_REPLACE);
-}
-
/*
Local Variables:
c-basic-offset:2
~mdw / disorder / blobdiff