1 /* ====================================================================
2 * Copyright (c) 1995-1999 The Apache Group. All rights reserved.
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5 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Group and was originally based
51 * on public domain software written at the National Center for
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58 #ifndef APACHE_HTTP_PROTOCOL_H
59 #define APACHE_HTTP_PROTOCOL_H
62 #include "apr_portable.h"
69 * Prototypes for routines which either talk directly back to the user,
70 * or control the ones that eventually do.
73 /* Read a request and fill in the fields. */
75 request_rec *ap_read_request(conn_rec *c);
77 /* Send a single HTTP header field */
79 API_EXPORT_NONSTD(int) ap_send_header_field(request_rec *r, const char *fieldname,
80 const char *fieldval);
82 /* Send the minimal part of an HTTP response header... but modules should be
83 * very careful about using this, and should prefer ap_send_http_header().
84 * Much of the HTTP/1.1 implementation correctness depends on code in
85 * ap_send_http_header().
87 API_EXPORT(void) ap_basic_http_header(request_rec *r);
89 /* Send the Status-Line and header fields for HTTP response */
91 API_EXPORT(void) ap_send_http_header(request_rec *l);
93 /* Send the response to special method requests */
95 API_EXPORT(int) ap_send_http_trace(request_rec *r);
96 int ap_send_http_options(request_rec *r);
98 /* Finish up stuff after a request */
100 API_EXPORT(void) ap_finalize_request_protocol(request_rec *r);
102 /* Send error back to client... last arg indicates error status in case
103 * we get an error in the process of trying to deal with an ErrorDocument
104 * to handle some other error. In that case, we print the default report
105 * for the first thing that went wrong, and more briefly report on the
106 * problem with the ErrorDocument.
109 void ap_send_error_response(request_rec *r, int recursive_error);
111 /* Set last modified header line from the lastmod date of the associated file.
112 * Also, set content length.
114 * May return an error status, typically USE_LOCAL_COPY (that when the
115 * permit_cache argument is set to one).
118 API_EXPORT(int) ap_set_content_length(request_rec *r, long length);
119 API_EXPORT(int) ap_set_keepalive(request_rec *r);
120 API_EXPORT(time_t) ap_rationalize_mtime(request_rec *r, time_t mtime);
121 API_EXPORT(char *) ap_make_etag(request_rec *r, int force_weak);
122 API_EXPORT(void) ap_set_etag(request_rec *r);
123 API_EXPORT(void) ap_set_last_modified(request_rec *r);
124 API_EXPORT(int) ap_meets_conditions(request_rec *r);
126 /* Other ways to send stuff at the client. All of these keep track
127 * of bytes_sent automatically. This indirection is intended to make
128 * it a little more painless to slide things like HTTP-NG packetization
129 * underneath the main body of the code later. In the meantime, it lets
130 * us centralize a bit of accounting (bytes_sent).
132 * These also return the number of bytes written by the call.
133 * They should only be called with a timeout registered, for obvious reaasons.
134 * (Ditto the send_header stuff).
137 API_EXPORT(long) ap_send_fd(int fd, request_rec *r);
138 API_EXPORT(long) ap_send_fd_length(int fd, request_rec *r, long length);
140 API_EXPORT(long) ap_send_fb(BUFF *f, request_rec *r);
141 API_EXPORT(long) ap_send_fb_length(BUFF *f, request_rec *r, long length);
143 API_EXPORT(size_t) ap_send_mmap(void *mm, request_rec *r, size_t offset,
146 /* Hmmm... could macrofy these for now, and maybe forever, though the
147 * definitions of the macros would get a whole lot hairier.
150 API_EXPORT(int) ap_rputc(int c, request_rec *r);
151 API_EXPORT(int) ap_rputs(const char *str, request_rec *r);
152 API_EXPORT(int) ap_rwrite(const void *buf, int nbyte, request_rec *r);
153 API_EXPORT_NONSTD(int) ap_rvputs(request_rec *r,...);
154 API_EXPORT(int) ap_vrprintf(request_rec *r, const char *fmt, va_list vlist);
155 API_EXPORT_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt,...)
156 __attribute__((format(printf,2,3)));
157 API_EXPORT(int) ap_rflush(request_rec *r);
160 * Index used in custom_responses array for a specific error code
161 * (only use outside protocol.c is in getting them configured).
164 API_EXPORT(int) ap_index_of_response(int status);
166 /* Reading a block of data from the client connection (e.g., POST arg) */
168 API_EXPORT(int) ap_setup_client_block(request_rec *r, int read_policy);
169 API_EXPORT(int) ap_should_client_block(request_rec *r);
170 API_EXPORT(long) ap_get_client_block(request_rec *r, char *buffer, int bufsiz);
171 API_EXPORT(int) ap_discard_request_body(request_rec *r);
173 /* Sending a byterange */
175 API_EXPORT(int) ap_set_byterange(request_rec *r);
176 API_EXPORT(int) ap_each_byterange(request_rec *r, long *offset, long *length);
178 /* Support for the Basic authentication protocol. Note that there's
179 * nothing that prevents these from being in mod_auth.c, except that other
180 * modules which wanted to provide their own variants on finding users and
181 * passwords for Basic auth (a fairly common request) would then require
182 * mod_auth to be loaded or they wouldn't work.
184 * get_basic_auth_pw returns 0 (OK) if it set the 'pw' argument (and assured
185 * a correct value in r->connection->user); otherwise it returns an error
186 * code, either SERVER_ERROR if things are really confused, AUTH_REQUIRED
187 * if no authentication at all seemed to be in use, or DECLINED if there
188 * was authentication but it wasn't Basic (in which case, the caller should
189 * presumably decline as well).
191 * note_basic_auth_failure arranges for the right stuff to be scribbled on
192 * the HTTP return so that the client knows how to authenticate itself the
193 * next time. As does note_digest_auth_failure for Digest auth.
195 * note_auth_failure does the same thing, but will call the correct one
196 * based on the authentication type in use.
200 API_EXPORT(void) ap_note_auth_failure(request_rec *r);
201 API_EXPORT(void) ap_note_basic_auth_failure(request_rec *r);
202 API_EXPORT(void) ap_note_digest_auth_failure(request_rec *r);
203 API_EXPORT(int) ap_get_basic_auth_pw(request_rec *r, const char **pw);
206 * Setting up the protocol fields for subsidiary requests...
207 * Also, a wrapup function to keep the internal accounting straight.
210 void ap_set_sub_req_protocol(request_rec *rnew, const request_rec *r);
211 void ap_finalize_sub_req_protocol(request_rec *sub_r);
213 /* This is also useful for putting sub_reqs and internal_redirects together */
215 CORE_EXPORT(void) ap_parse_uri(request_rec *r, const char *uri);
217 /* Get the method number associated with the given string, assumed to
218 * contain an HTTP method. Returns M_INVALID if not recognized.
220 API_EXPORT(int) ap_method_number_of(const char *method);
224 * post_read_request --- run right after read_request or internal_redirect,
225 * and not run during any subrequests.
227 DECLARE_HOOK(int,post_read_request,(request_rec *))
228 DECLARE_HOOK(int,log_transaction,(request_rec *))
229 DECLARE_HOOK(const char *,http_method,(const request_rec *))
230 DECLARE_HOOK(unsigned short,default_port,(const request_rec *))
236 #endif /* !APACHE_HTTP_PROTOCOL_H */