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