1 #ifndef _HTTPD_H_
2 #define _HTTPD_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 /*
7 #pragma	lib	"libhttpd.a"
8 #pragma	src	"/sys/src/libhttpd"
9 */
10 
11 typedef struct HConnect		HConnect;
12 typedef struct HContent		HContent;
13 typedef struct HContents	HContents;
14 typedef struct HETag		HETag;
15 typedef struct HFields		HFields;
16 typedef struct Hio		Hio;
17 typedef struct Htmlesc		Htmlesc;
18 typedef struct HttpHead		HttpHead;
19 typedef struct HttpReq		HttpReq;
20 typedef struct HRange		HRange;
21 typedef struct HSPairs		HSPairs;
22 
23 #ifndef _HAVE_BIN
24 typedef struct Bin		Bin;
25 #define _HAVE_BIN
26 #endif
27 
28 enum
29 {
30 	HMaxWord	= 32*1024,
31 	HBufSize	= 32*1024,
32 
33 	/*
34 	 * error messages
35 	 */
36 	HInternal	= 0,
37 	HTempFail,
38 	HUnimp,
39 	HBadReq,
40 	HBadSearch,
41 	HNotFound,
42 	HUnauth,
43 	HSyntax,
44 	HNoSearch,
45 	HNoData,
46 	HExpectFail,
47 	HUnkVers,
48 	HBadCont,
49 	HOK,
50 };
51 
52 /*
53  * table of html character escape codes
54  */
55 struct Htmlesc
56 {
57 	char		*name;
58 	Rune		value;
59 };
60 
61 struct HContent
62 {
63 	HContent	*next;
64 	char		*generic;
65 	char		*specific;
66 	float		q;			/* desirability of this kind of file */
67 	int		mxb;			/* max uchars until worthless */
68 };
69 
70 struct HContents
71 {
72 	HContent	*type;
73 	HContent	 *encoding;
74 };
75 
76 /*
77  * generic http header with a list of tokens,
78  * each with an optional list of parameters
79  */
80 struct HFields
81 {
82 	char		*s;
83 	HSPairs		*params;
84 	HFields		*next;
85 };
86 
87 /*
88  * list of pairs a strings
89  * used for tag=val pairs for a search or form submission,
90  * and attribute=value pairs in headers.
91  */
92 struct HSPairs
93 {
94 	char		*s;
95 	char		*t;
96 	HSPairs		*next;
97 };
98 
99 /*
100  * byte ranges within a file
101  */
102 struct HRange
103 {
104 	int		suffix;			/* is this a suffix request? */
105 	ulong		start;
106 	ulong		stop;			/* ~0UL -> not given */
107 	HRange		*next;
108 };
109 
110 /*
111  * list of http/1.1 entity tags
112  */
113 struct HETag
114 {
115 	char		*etag;
116 	int		weak;
117 	HETag		*next;
118 };
119 
120 /*
121  * HTTP custom IO
122  * supports chunked transfer encoding
123  * and initialization of the input buffer from a string.
124  */
125 enum
126 {
127 	Hnone,
128 	Hread,
129 	Hend,
130 	Hwrite,
131 	Herr,
132 
133 	Hsize = HBufSize
134 };
135 
136 struct Hio {
137 	Hio		*hh;			/* next lower layer Hio, or nil if reads from fd */
138 	int		fd;			/* associated file descriptor */
139 	ulong		seek;			/* of start */
140 	uchar		state;			/* state of the file */
141 	uchar		xferenc;		/* chunked transfer encoding state */
142 	uchar		*pos;			/* current position in the buffer */
143 	uchar		*stop;			/* last character active in the buffer */
144 	uchar		*start;			/* start of data buffer */
145 	ulong		bodylen;		/* remaining length of message body */
146 	uchar		buf[Hsize+32];
147 };
148 
149 /*
150  * request line
151  */
152 struct HttpReq
153 {
154 	char		*meth;
155 	char		*uri;
156 	char		*urihost;
157 	char		*search;
158 	int		vermaj;
159 	int		vermin;
160 };
161 
162 /*
163  * header lines
164  */
165 struct HttpHead
166 {
167 	int		closeit;		/* http1.1 close connection after this request? */
168 	uchar		persist;		/* http/1.1 requests a persistent connection */
169 
170 	uchar		expectcont;		/* expect a 100-continue */
171 	uchar		expectother;		/* expect anything else; should reject with ExpectFail */
172 	ulong		contlen;		/* if != ~0UL, length of included message body */
173 	HFields		*transenc;		/* if present, encoding of included message body */
174 	char		*client;
175 	char		*host;
176 	HContent	*okencode;
177 	HContent	*oklang;
178 	HContent	*oktype;
179 	HContent	*okchar;
180 	ulong		ifmodsince;
181 	ulong		ifunmodsince;
182 	ulong		ifrangedate;
183 	HETag		*ifmatch;
184 	HETag		*ifnomatch;
185 	HETag		*ifrangeetag;
186 	HRange		*range;
187 	char		*authuser;		/* authorization info */
188 	char		*authpass;
189 
190 	/*
191 	 * experimental headers
192 	 */
193 	int		fresh_thresh;
194 	int		fresh_have;
195 };
196 
197 /*
198  * all of the state for a particular connection
199  */
200 struct HConnect
201 {
202 	void		*private;		/* for the library clients */
203 	void		(*replog)(HConnect*, char*, ...);	/* called when reply sent */
204 
205 	HttpReq		req;
206 	HttpHead	head;
207 
208 	Bin		*bin;
209 
210 	ulong		reqtime;		/* time at start of request */
211 	char		xferbuf[HBufSize];	/* buffer for making up or transferring data */
212 	uchar		header[HBufSize + 2];	/* room for \n\0 */
213 	uchar		*hpos;
214 	uchar		*hstop;
215 	Hio		hin;
216 	Hio		hout;
217 };
218 
219 /*
220  * configuration for all connections within the server
221  */
222 extern	char*		hmydomain;
223 extern	char*		hversion;
224 extern	Htmlesc		htmlesc[];
225 
226 /*
227  * .+2,/^$/ | sort -bd +1
228  */
229 void			*halloc(HConnect *c, ulong size);
230 Hio			*hbodypush(Hio *hh, ulong len, HFields *te);
231 int			hbuflen(Hio *h, void *p);
232 int			hcheckcontent(HContent*, HContent*, char*, int);
233 void			hclose(Hio*);
234 ulong			hdate2sec(char*);
235 int			hdatefmt(Fmt*);
236 int			hfail(HConnect*, int, ...);
237 int			hflush(Hio*);
238 int			hgetc(Hio*);
239 int			hgethead(HConnect *c, int many);
240 int			hinit(Hio*, int, int);
241 int			hiserror(Hio *h);
242 int			hload(Hio*, char*);
243 char			*hlower(char*);
244 HContent		*hmkcontent(HConnect *c, char *generic, char *specific, HContent *next);
245 HFields			*hmkhfields(HConnect *c, char *s, HSPairs *p, HFields *next);
246 char			*hmkmimeboundary(HConnect *c);
247 HSPairs			*hmkspairs(HConnect *c, char *s, char *t, HSPairs *next);
248 int			hmoved(HConnect *c, char *uri);
249 void			hokheaders(HConnect *c);
250 int			hparseheaders(HConnect*, int timeout);
251 HSPairs			*hparsequery(HConnect *c, char *search);
252 int			hparsereq(HConnect *c, int timeout);
253 int			hprint(Hio*, char*, ...);
254 int			hputc(Hio*, int);
255 void			*hreadbuf(Hio *h, void *vsave);
256 int			hredirected(HConnect *c, char *how, char *uri);
257 void			hreqcleanup(HConnect *c);
258 HFields			*hrevhfields(HFields *hf);
259 HSPairs			*hrevspairs(HSPairs *sp);
260 char			*hstrdup(HConnect *c, char *s);
261 int			http11(HConnect*);
262 int			httpfmt(Fmt*);
263 char			*httpunesc(HConnect *c, char *s);
264 int			hunallowed(HConnect *, char *allowed);
265 int			hungetc(Hio *h);
266 char			*hunload(Hio*);
267 int			hurlfmt(Fmt*);
268 char			*hurlunesc(HConnect *c, char *s);
269 int			hwrite(Hio*, void*, int);
270 int			hxferenc(Hio*, int);
271 
272 /*
273 #pragma			varargck	argpos	hprint	2
274 */
275 /*
276  * D is httpd format date conversion
277  * U is url escape convertsion
278  * H is html escape conversion
279  */
280 /*
281 #pragma	varargck	type	"D"	long
282 #pragma	varargck	type	"D"	ulong
283 #pragma	varargck	type	"U"	char*
284 #pragma	varargck	type	"H"	char*
285 */
286 
287 #if defined(__cplusplus)
288 }
289 #endif
290 #endif