#pragma	lib	"libhttpd.a"#pragma	src	"/sys/src/libhttpd" typedef struct HConnect		HConnect;typedef struct HContent		HContent;typedef struct HContents	HContents;typedef struct HETag		HETag;typedef struct HFields		HFields;typedef struct Hio		Hio;typedef struct Htmlesc		Htmlesc;typedef struct HttpHead		HttpHead;typedef struct HttpReq		HttpReq;typedef struct HRange		HRange;typedef struct HSPairs		HSPairs; typedef struct Bin		Bin; enum{	HMaxWord	= 32*1024,	HBufSize	= 32*1024, 	/*	 * error messages	 */	HInternal	= 0,	HTempFail,	HUnimp,	HBadReq,	HBadSearch,	HNotFound,	HUnauth,	HSyntax,	HNoSearch,	HNoData,	HExpectFail,	HUnkVers,	HBadCont,	HOK,}; /* * table of html character escape codes */struct Htmlesc{	char	*name;	Rune	value;}; struct HContent{	HContent	*next;	char		*generic;	char		*specific;	float		q;			/* desirability of this kind of file */	int		mxb;			/* max uchars until worthless */}; struct HContents{	HContent	*type;	HContent *encoding;}; /* * generic http header with a list of tokens, * each with an optional list of parameters */struct HFields{	char		*s;	HSPairs		*params;	HFields		*next;}; /* * list of pairs a strings * used for tag=val pairs for a search or form submission, * and attribute=value pairs in headers. */struct HSPairs{	char		*s;	char		*t;	HSPairs		*next;}; /* * uchar ranges within a file */struct HRange{	int		suffix;			/* is this a suffix request? */	ulong		start;	ulong		stop;			/* ~0UL -> not given */	HRange		*next;}; /* * list of http/1.1 entity tags */struct HETag{	char		*etag;	int		weak;	HETag		*next;}; /* * HTTP custom IO * supports chunked transfer encoding * and initialization of the input buffer from a string. */enum{	Hnone,	Hread,	Hend,	Hwrite,	Herr, 	Hsize = HBufSize}; struct Hio {	Hio		*hh;			/* next lower layer Hio, or nil if reads from fd */	int		fd;			/* associated file descriptor */	ulong		seek;			/* of start */	uchar		state;			/* state of the file */	uchar		xferenc;		/* chunked transfer encoding state */	uchar		*pos;			/* current position in the buffer */	uchar		*stop;			/* last character active in the buffer */	uchar		*start;			/* start of data buffer */	ulong		bodylen;		/* remaining length of message body */	uchar		buf[Hsize+32];}; /* * request line */struct HttpReq{	/*	 * request line	 */	char		*meth;	char		*uri;	char		*urihost;	char		*search;	int		vermaj;	int		vermin;}; /* * header lines */struct HttpHead{	int		closeit;		/* http1.1 close connection after this request? */	uchar		persist;		/* <http/1.1 requests a persistent connection */ 	uchar		expectcont;		/* expect a 100-continue */	uchar		expectother;		/* expect anything else; should reject with ExpectFail */	ulong		contlen;		/* if != ~0UL, length of included message body */	HFields		*transenc;		/* if present, encoding of included message body */	char		*client;	char		*host;	HContent	*okencode;	HContent	*oklang;	HContent	*oktype;	HContent	*okchar;	ulong		ifmodsince;	ulong		ifunmodsince;	ulong		ifrangedate;	HETag		*ifmatch;	HETag		*ifnomatch;	HETag		*ifrangeetag;	HRange		*range;	char		*authuser;		/* authorization info */	char		*authpass; 	/*	 * experimental headers	 */	int		fresh_thresh;	int		fresh_have;}; /* * all of the state for a particular connection */struct HConnect{	void		*private;		/* for the library clients */	void		(*replog)(HConnect*, char*, ...);	/* called when reply sent */ 	HttpReq		req;	HttpHead	head; 	Bin		*bin; 	ulong		reqtime;		/* time at start of request */	char		xferbuf[HBufSize];	/* buffer for making up or transferring data */	uchar		header[HBufSize + 2];	/* room for \n\0 */	uchar		*hpos;	uchar		*hstop;	Hio		hin;	Hio		hout;}; /* * configuration for all connections within the server */extern	char*		hmydomain;extern	char*		hversion;extern	Htmlesc		htmlesc[]; char			*hstrdup(HConnect *c, char *s);void			*halloc(HConnect *c, ulong size); char			*hunload(Hio*);int			hload(Hio*, char*);int			hgetc(Hio*);void			*hreadbuf(Hio *h, void *vsave);int			hungetc(Hio *h);int			hputc(Hio*, int);int			hprint(Hio*, char*, ...);#pragma			varargck	argpos	hprint	2int			hwrite(Hio*, void*, int);int			hinit(Hio*, int, int);int			hflush(Hio*);int			hxferenc(Hio*, int);void			hclose(Hio*);int			hiserror(Hio *h);int			hbuflen(Hio *h, void *p);Hio			*hbodypush(Hio *hh, ulong len, HFields *te);int			hcheckcontent(HContent*, HContent*, char*, int);ulong			hdate2sec(char*);int			hdateconv(va_list*, Fconv*);int			hfail(HConnect*, int, ...);int			hgethead(HConnect *c, int many);int			http11(HConnect*);int			httpconv(va_list*, Fconv*);char*			httpunesc(HConnect *c, char *s);char*			hlower(char*);HContent*		hmkcontent(HConnect *c, char *generic, char *specific, HContent *next);char*			hmkmimeboundary(HConnect *c);HFields*		hmkhfields(HConnect *c, char *s, HSPairs *p, HFields *next);HSPairs*		hmkspairs(HConnect *c, char *s, char *t, HSPairs *next);int			hmoved(HConnect *c, char *uri);void			hokheaders(HConnect *c);int			hparsereq(HConnect *c, int timeout);int			hparseheaders(HConnect*, int timeout);HSPairs*		hparsequery(HConnect *c, char *search);int			hredirected(HConnect *c, char *how, char *uri);void			hreqcleanup(HConnect *c);HFields*		hrevhfields(HFields *hf);HSPairs*		hrevspairs(HSPairs *sp);int			hunallowed(HConnect *, char *allowed);int			hurlconv(va_list*, Fconv*);char*			hurlunesc(HConnect *c, char *s); /* * D is httpd format date conversion * U is url escape convertsion * H is html escape conversion */#pragma	varargck	type	"D"	long#pragma	varargck	type	"D"	ulong#pragma	varargck	type	"U"	char*#pragma	varargck	type	"H"	char*