cgi_register_parse_cb man page on DragonFly
cgi_register_parse_cb(3) cgi/cgi.h cgi_register_parse_cb(3)
cgi_register_parse_cb - Register a parse callback
NEOERR *cgi_register_parse_cb(CGI *cgi, const char *method, const char *ctype,
void *rock, CGI_PARSE_CB parse_cb);
cgi - a CGI struct
method - the HTTP method you want to handle, or * for all
ctype - the HTTP Content-Type you want to handle, or * for all
rock - opaque data that we'll pass to your call back
The ClearSilver CGI Kit has built-in functionality to handle the fol‐
lowing methods: GET -> doesn't have any data except query string, which
is processed for all methods POST w/ application/x-www-form-urlencoded
POST w/ multipart/form-data processed as RFC2388 data into files and
HDF (see cgi_filehandle()) PUT (any type) The entire data chunk is
stored as a file, with meta data in HDF (similar to single files in
RFC2388). The data is accessible via cgi_filehandle with NULL for
name. To handle other methods/content types, you have to register your
own parse function. This isn't necessary if you aren't expecting any
data, and technically HTTP only allows data on PUT/POST requests (and
presumably user defined methods). In particular, if you want to imple‐
ment XML-RPC or SOAP, you'll have to register a callback here to grab
the XML data chunk. Usually you'll want to register POST w/ applica‐
tion/xml or POST w/ text/xml (you either need to register both or reg‐
ister POST w/ * and check the ctype yourself, remember to
nerr_raise(CGIParseNotHandled) if you aren't handling the POST). In
general, your callback should: Find out how much data is available: l =
hdf_get_value (cgi->hdf, "CGI.ContentLength", NULL); len = atoi(l); And
read/handle all of the data using cgiwrap_read. See the builtin han‐
dlers for how this is done. Note that cgiwrap_read is not guarunteed
to return all of the data you request (just like fread(3)) since it
might be reading of a socket. Sorry. You should be careful when read‐
ing the data to watch for short reads (ie, end of file) and cases where
the client sends you data ad infinitum.
cgi_debug_init(3), cgi_parse(3), cgi_destroy(3), cgi_js_escape(3),
cgi_html_escape_strfunc(3), cgi_register_strfuncs(3), cgi_output(3),
parse_rfc2388(3), cgi_url_validate(3), open_upload(3), cgi_cs_init(3),
cgi_url_escape_more(3), cgi_html_strip_strfunc(3), cgi_neo_error(3),
cgi_redirect(3), cgi_filehandle(3), cgi_register_parse_cb(3),
cgi_url_escape(3), cgi_init(3), cgi_redirect_uri(3),
cgi_cookie_clear(3), cgi_url_unescape(3), cgi_vredirect(3), cgi_dis‐
play(3), cgi_html_ws_strip(3), cgi_error(3), cgi_cookie_set(3),
ClearSilver 12 July 2007 cgi_register_parse_cb(3)
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