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
|
#include "Fetcher.hpp"
#include "Frontier.hpp"
#include "Deduper.hpp"
#include "Processor.hpp"
#include "URLSeen.hpp"
#include "URLNormalizer.hpp"
#include "URLFilter.hpp"
#include "TypeDetect.hpp"
#include "ModuleLoader.hpp"
#include "Logger.hpp"
#include <set>
#include <vector>
#include <list>
#ifndef _WIN32
#include <signal.h>
#else
#define WIN32_MEAN_AND_LEAN
#endif
using namespace std;
static bool term = false;
#ifndef _WIN32
static void terminate_func( int sig )
{
(void)sig;
term = true;
}
#else
BOOL WINAPI termHandler( DWORD ctrlType )
{
switch( ctrlType ){
case CTRL_C_EVENT:
case CTRL_BREAK_EVENT:
case CTRL_CLOSE_EVENT:
case CTRL_LOGOFF_EVENT:
case CTRL_SHUTDOWN_EVENT:
term = true;
return TRUE;
default:
return FALSE;
}
}
#endif
int main( void )
{
FILELog::reportingLevel( ) = logINFO;
#ifndef _WIN32
struct sigaction sa;
memset( &sa, 0, sizeof( struct sigaction ) );
sa.sa_handler = terminate_func;
sa.sa_flags = SA_RESTART;
if( sigaction( SIGINT, &sa, NULL ) < 0 ) {
cerr << "Unable to install termianation signal handler" << endl;
}
#else
SetConsoleCtrlHandler( termHandler, TRUE );
#endif
LOG( logNOTICE ) << "Loading modules";
vector<string> normalizerModules;
normalizerModules.push_back( "./modules/urlnormalizer/simpleurl/mod_urlnormalizer_simple.so" );
normalizerModules.push_back( "./modules/urlnormalizer/googleurl/mod_urlnormalizer_googleurl.so" );
ModuleLoader<URLNormalizer> urlNormalizers( normalizerModules );
vector<string> filterModules;
filterModules.push_back( "./modules/urlfilter/protocol/mod_urlfilter_protocol.so" );
filterModules.push_back( "./modules/urlfilter/host/mod_urlfilter_host.so" );
ModuleLoader<URLFilter, TYPELIST_1( const set<string> ) > urlFilters( filterModules );
vector<string> filterChainModules;
filterChainModules.push_back( "./modules/urlfilter/chain/mod_urlfilter_chain.so" );
ModuleLoader<URLFilter, TYPELIST_1( const list<URLFilter *> ) > urlChainFilter( filterChainModules );
vector<string> frontierModules;
frontierModules.push_back( "./modules/frontier/memory/mod_frontier_memory.so" );
ModuleLoader<Frontier> frontiers( frontierModules );
vector<string> fetcherModules;
fetcherModules.push_back( "./modules/fetcher/libfetch/mod_fetcher_libfetch.so" );
ModuleLoader<Fetcher> fetchers( fetcherModules );
vector<string> urlseenModules;
urlseenModules.push_back( "./modules/urlseen/memory/mod_urlseen_memory.so" );
ModuleLoader<URLSeen> urlSeens( urlseenModules );
vector<string> deduperModules;
deduperModules.push_back( "./modules/deduper/null/mod_deduper_null.so" );
ModuleLoader<Deduper> dedupers( deduperModules );
vector<string> processorModules;
processorModules.push_back( "./modules/processor/htmllinkextract/mod_processor_htmllinkextract.so" );
ModuleLoader<Processor, TYPELIST_4( URLNormalizer *, Frontier *, URLFilter *, URLSeen * ) > processors( processorModules );
vector<string> typeDetectModules;
typeDetectModules.push_back( "./modules/typedetect/libmagic/mod_typedetect_libmagic.so" );
ModuleLoader<TypeDetect> typeDetectors( typeDetectModules );
Frontier *frontier = frontiers.create( "memory" );
Fetcher *fetcher = fetchers.create( "libfetch" );
Deduper *deduper = dedupers.create( "null" );
URLSeen *urlSeen = urlSeens.create( "memory" );
TypeDetect *typeDetect = typeDetectors.create( "libmagic" );
set<string> protocols;
protocols.insert( "http" );
protocols.insert( "https" );
URLFilter *protocolFilter = urlFilters.create( "protocol", protocols );
set<string> hosts;
hosts.insert( "www.andreasbaumann.cc" );
URLFilter *hostFilter = urlFilters.create( "host", hosts );
list<URLFilter *> filters;
filters.push_back( hostFilter );
filters.push_back( protocolFilter );
URLFilter *chainFilter = urlChainFilter.create( "chain", filters );
URLNormalizer *normalizer = urlNormalizers.create( "google" );
Processor *htmlParser = processors.create( "htmllinkextract",
normalizer, frontier, chainFilter, urlSeen );
LOG( logNOTICE ) << "Crawler started..";
frontier->addUrl( normalizer->parseUrl( "http://www.andreasbaumann.cc" ) );
URL url;
while( !term && ( url = frontier->getNextUrl( ) ) != URL::Null ) {
LOG( logINFO ) << "Got URL " << url;
RewindInputStream *s = fetcher->fetch( url );
if( deduper->contentSeen( url, s ) ) {
LOG( logINFO ) << "URL " << url << " is a duplicate, content already seen";
delete s;
continue;
}
MIMEType mimeType = typeDetect->detect( s );
if( mimeType != MIMEType::Null ) {
if( mimeType == "text/html" ) {
s->rewind( );
htmlParser->process( s );
} else if( mimeType == "application/octet-stream" ) {
s->rewind( );
LOG( logINFO ) << "Storing binary content " << url;
}
}
delete s;
}
processors.destroy( htmlParser );
urlNormalizers.destroy( normalizer );
urlChainFilter.destroy( chainFilter );
urlFilters.destroy( protocolFilter );
urlFilters.destroy( hostFilter );
typeDetectors.destroy( typeDetect );
urlSeens.destroy( urlSeen );
dedupers.destroy( deduper );
fetchers.destroy( fetcher );
frontiers.destroy( frontier );
LOG( logNOTICE ) << "Crawler stopped..";
return 0;
}
|
