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/*@@
@file Content.txt
@date 08.04.2004
@author Steve White
@desc
Description of the Content interface
@enddesc
@version $Header$
@@*/
There is an interface for setting HTML page content information, which is
accessed by including http_Content.h.
This provides functions
int HTTP_SendString(httpRequest *request, const String* message);
which sends the string message to HTTP,
void HTTP_SetHeadInfo( String *header);
which copies a string containing typical content of the HEAD element of
the standard Cactus HTTPD web pages. Particularly, it includes style
information, but not the title of the page.
void HTTP_SetDoctype( String *header);
which copies a standard DOCTYPE tag into the string. Typical use will
be to emit this string immediately before the first HTML tag of the
web page being generated.
int HTTP_SetContentHeaderString(const cGH *cctkGH, int choice, String *mess,
const String *menu);
This copies standard Cactus body HTML information into the string mess.
If choice is nonzero, the information is appropriate for a main page;
if it is 0, the information is appropriate for non-main pages.
If the menu argument is non-null, that string will be appended as
HTML to the standard menus.
int HTTP_SetContentFooterString(const cGH *cctkGH, int choice, String *mess );
This copies standard Cactus footer HTML into the string mess; if choice is
nonzero, the information is appropriate for the main page.
int HTTP_ContentSendFromFile(httpRequest *request, int filedes);
which emits the entirety of the file referred to by file descriptor filedes
to HTTP,
int HTTP_ContentLink(const char *URL,
const char *name,
const char *description,
int flags);
which...I don't know what this does.
The functions
int HTTP_ContentHeader(const cGH *cctkGH, int choice, int len, char *mess,
const char *menu);
int HTTP_ContentFooter(const cGH *cctkGH, int choice, int len, char *mess);
are a little dangerous. They are like the corresponding ContentHeader and
Footer calls above, with the len attribute indicating the length of the
character buffer mess.
------------------------------------
Other included functions
int HTTP_SendString(httpRequest *request, const String* message);
Example:
--------
A web page is typically generated in the following sequence.
The HTTP connection has already been established and saved in the httpRequest
pointer, and a String instance 'message' has been created.
0) HTTP_SendOKHeader( httpRequest )
1a) HTTP_SetDoctype( message );
1b) HTTP_SendString( httpRequest, message );
2) HTTP_Send( httpRequest, "<html><head>\n" );
3) HTTP_Send( httpRequest, "<title>My Title</title>\n" );
4a) HTTP_HeadInfo( message );
4b) HTTP_SendString( httpRequest, message );
5) HTTP_Send( httpRequest, "</head><body>\n" );
6) HTTP_HeadInfo( httpRequest );
7a) HTTP_SetContentHeaderString(cctkGH, choice, message, menu);
7b) HTTP_SendString( httpRequest, message );
8) Page content
9a) HTTP_SetContentFooterString(cctkGH, choice, message);
9b) HTTP_SendString( httpRequest, message );
10) HTTP_Send( httpRequest, "</body></html>\n" );
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