cgi_register_parse_cb - Man Page

Register a parse callback


#include <cgi/cgi.h>
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 following 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 implement 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/ application/xml or POST w/ text/xml (you either need to register both or register 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 handlers 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 reading the data to watch for short reads (ie, end of file) and cases where the client sends you data ad infinitum.

Return Value


See Also

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_display(3), cgi_html_ws_strip(3), cgi_error(3), cgi_cookie_set(3), cgi_text_html_strfunc(3), cgi_cookie_authority

Referenced By

cgi_cookie_authority(3), cgi_cookie_clear(3), cgi_cookie_set(3), cgi_cs_init(3), cgi_debug_init(3), cgi_destroy(3), cgi_display(3), cgi_error(3), cgi_filehandle(3), cgi_init(3), cgi_neo_error(3), cgi_output(3), cgi_parse(3), cgi_redirect(3), cgi_redirect_uri(3), cgi_url_escape(3), cgi_url_escape_more(3), cgi_url_unescape(3), cgi_url_validate(3), cgi_vredirect(3).

12 July 2007 ClearSilver cgi/cgi.h