| Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * httpread - Manage reading file(s) from HTTP/TCP socket |
| 3 | * Author: Ted Merrill |
| 4 | * Copyright 2008 Atheros Communications |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * Alternatively, this software may be distributed under the terms of BSD |
| 11 | * license. |
| 12 | * |
| 13 | * See README and COPYING for more details. |
| 14 | */ |
| 15 | |
| 16 | #ifndef HTTPREAD_H |
| 17 | #define HTTPREAD_H |
| 18 | |
| 19 | /* event types (passed to callback) */ |
| 20 | enum httpread_event { |
| 21 | HTTPREAD_EVENT_FILE_READY = 1, /* including reply ready */ |
| 22 | HTTPREAD_EVENT_TIMEOUT = 2, |
| 23 | HTTPREAD_EVENT_ERROR = 3 /* misc. error, esp malloc error */ |
| 24 | }; |
| 25 | |
| 26 | |
| 27 | /* header type detected |
| 28 | * available to callback via call to httpread_reply_code_get() |
| 29 | */ |
| 30 | enum httpread_hdr_type { |
| 31 | HTTPREAD_HDR_TYPE_UNKNOWN = 0, /* none of the following */ |
| 32 | HTTPREAD_HDR_TYPE_REPLY = 1, /* hdr begins w/ HTTP/ */ |
| 33 | HTTPREAD_HDR_TYPE_GET = 2, /* hdr begins with GET<sp> */ |
| 34 | HTTPREAD_HDR_TYPE_HEAD = 3, /* hdr begins with HEAD<sp> */ |
| 35 | HTTPREAD_HDR_TYPE_POST = 4, /* hdr begins with POST<sp> */ |
| 36 | HTTPREAD_HDR_TYPE_PUT = 5, /* hdr begins with ... */ |
| 37 | HTTPREAD_HDR_TYPE_DELETE = 6, /* hdr begins with ... */ |
| 38 | HTTPREAD_HDR_TYPE_TRACE = 7, /* hdr begins with ... */ |
| 39 | HTTPREAD_HDR_TYPE_CONNECT = 8, /* hdr begins with ... */ |
| 40 | HTTPREAD_HDR_TYPE_NOTIFY = 9, /* hdr begins with ... */ |
| 41 | HTTPREAD_HDR_TYPE_M_SEARCH = 10, /* hdr begins with ... */ |
| 42 | HTTPREAD_HDR_TYPE_M_POST = 11, /* hdr begins with ... */ |
| 43 | HTTPREAD_HDR_TYPE_SUBSCRIBE = 12, /* hdr begins with ... */ |
| 44 | HTTPREAD_HDR_TYPE_UNSUBSCRIBE = 13, /* hdr begins with ... */ |
| 45 | |
| 46 | HTTPREAD_N_HDR_TYPES /* keep last */ |
| 47 | }; |
| 48 | |
| 49 | |
| 50 | /* control instance -- opaque struct declaration |
| 51 | */ |
| 52 | struct httpread; |
| 53 | |
| 54 | |
| 55 | /* httpread_destroy -- if h is non-NULL, clean up |
| 56 | * This must eventually be called by the application following |
| 57 | * call of the application's callback and may be called |
| 58 | * earlier if desired. |
| 59 | */ |
| 60 | void httpread_destroy(struct httpread *h); |
| 61 | |
| 62 | /* httpread_create -- start a new reading session making use of eloop. |
| 63 | * The new instance will use the socket descriptor for reading (until |
| 64 | * it gets a file and not after) but will not close the socket, even |
| 65 | * when the instance is destroyed (the application must do that). |
| 66 | * Return NULL on error. |
| 67 | * |
| 68 | * Provided that httpread_create successfully returns a handle, |
| 69 | * the callback fnc is called to handle httpread_event events. |
| 70 | * The caller should do destroy on any errors or unknown events. |
| 71 | * |
| 72 | * Pass max_bytes == 0 to not read body at all (required for e.g. |
| 73 | * reply to HEAD request). |
| 74 | */ |
| 75 | struct httpread * httpread_create( |
| 76 | int sd, /* descriptor of TCP socket to read from */ |
| 77 | void (*cb)(struct httpread *handle, void *cookie, |
| 78 | enum httpread_event e), /* call on event */ |
| 79 | void *cookie, /* pass to callback */ |
| 80 | int max_bytes, /* maximum file size else abort it */ |
| 81 | int timeout_seconds /* 0; or total duration timeout period */ |
| 82 | ); |
| 83 | |
| 84 | /* httpread_hdr_type_get -- When file is ready, returns header type. |
| 85 | */ |
| 86 | enum httpread_hdr_type httpread_hdr_type_get(struct httpread *h); |
| 87 | |
| 88 | |
| 89 | /* httpread_uri_get -- When file is ready, uri_get returns (translated) URI |
| 90 | * or possibly NULL (which would be an error). |
| 91 | */ |
| 92 | char *httpread_uri_get(struct httpread *h); |
| 93 | |
| 94 | /* httpread_reply_code_get -- When reply is ready, returns reply code */ |
| 95 | int httpread_reply_code_get(struct httpread *h); |
| 96 | |
| 97 | |
| 98 | /* httpread_length_get -- When file is ready, returns file length. */ |
| 99 | int httpread_length_get(struct httpread *h); |
| 100 | |
| 101 | /* httpread_data_get -- When file is ready, returns file content |
| 102 | * with null byte appened. |
| 103 | * Might return NULL in some error condition. |
| 104 | */ |
| 105 | void * httpread_data_get(struct httpread *h); |
| 106 | |
| 107 | /* httpread_hdr_get -- When file is ready, returns header content |
| 108 | * with null byte appended. |
| 109 | * Might return NULL in some error condition. |
| 110 | */ |
| 111 | char * httpread_hdr_get(struct httpread *h); |
| 112 | |
| 113 | /* httpread_hdr_line_get -- When file is ready, returns pointer |
| 114 | * to line within header content matching the given tag |
| 115 | * (after the tag itself and any spaces/tabs). |
| 116 | * |
| 117 | * The tag should end with a colon for reliable matching. |
| 118 | * |
| 119 | * If not found, returns NULL; |
| 120 | */ |
| 121 | char * httpread_hdr_line_get(struct httpread *h, const char *tag); |
| 122 | |
| 123 | #endif /* HTTPREAD_H */ |