1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_OUTPUT_HTTPD_CLIENT_HXX
#define MPD_OUTPUT_HTTPD_CLIENT_HXX
#include "gcc.h"
#include <glib.h>
#include <list>
#include <stddef.h>
struct HttpdOutput;
class Page;
class HttpdClient final {
/**
* The httpd output object this client is connected to.
*/
HttpdOutput *const httpd;
/**
* The TCP socket.
*/
GIOChannel *channel;
/**
* The GLib main loop source id for reading from the socket,
* and to detect errors.
*/
guint read_source_id;
/**
* The GLib main loop source id for writing to the socket. If
* 0, then there is no event source currently (because there
* are no queued pages).
*/
guint write_source_id;
/**
* For buffered reading. This pointer is only valid while the
* HTTP request is read.
*/
struct fifo_buffer *input;
/**
* The current state of the client.
*/
enum {
/** reading the request line */
REQUEST,
/** reading the request headers */
HEADERS,
/** sending the HTTP response */
RESPONSE,
} state;
/**
* A queue of #Page objects to be sent to the client.
*/
std::list<Page *> pages;
/**
* The #page which is currently being sent to the client.
*/
Page *current_page;
/**
* The amount of bytes which were already sent from
* #current_page.
*/
size_t current_position;
/**
* If DLNA streaming was an option.
*/
bool dlna_streaming_requested;
/* ICY */
/**
* Do we support sending Icy-Metadata to the client? This is
* disabled if the httpd audio output uses encoder tags.
*/
bool metadata_supported;
/**
* If we should sent icy metadata.
*/
bool metadata_requested;
/**
* If the current metadata was already sent to the client.
*/
bool metadata_sent;
/**
* The amount of streaming data between each metadata block
*/
guint metaint;
/**
* The metadata as #Page which is currently being sent to the client.
*/
Page *metadata;
/*
* The amount of bytes which were already sent from the metadata.
*/
size_t metadata_current_position;
/**
* The amount of streaming data sent to the client
* since the last icy information was sent.
*/
guint metadata_fill;
public:
/**
* @param httpd the HTTP output device
* @param fd the socket file descriptor
*/
HttpdClient(HttpdOutput *httpd, int _fd, bool _metadata_supported);
/**
* Note: this does not remove the client from the
* #HttpdOutput object.
*/
~HttpdClient();
/**
* Frees the client and removes it from the server's client list.
*/
void Close();
void LockClose();
/**
* Returns the total size of this client's page queue.
*/
gcc_pure
size_t GetQueueSize() const;
/**
* Clears the page queue.
*/
void CancelQueue();
bool Read();
/**
* Data has been received from the client and it is appended
* to the input buffer.
*/
bool Received();
/**
* Check if a complete line of input is present in the input
* buffer, and duplicates it. It is removed from the input
* buffer. The return value has to be freed with g_free().
*/
char *ReadLine();
/**
* Handle a line of the HTTP request.
*/
bool HandleLine(const char *line);
/**
* Switch the client to the "RESPONSE" state.
*/
void BeginResponse();
/**
* Sends the status line and response headers to the client.
*/
bool SendResponse();
gcc_pure
int GetBytesTillMetaData() const;
bool Write();
/**
* Appends a page to the client's queue.
*/
void PushPage(Page *page);
/**
* Sends the passed metadata.
*/
void PushMetaData(Page *page);
};
#endif
|
