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964b44c3 | 1 | /* |
2cd0bda2 | 2 | * Copyright (C) 1996-2017 The Squid Software Foundation and contributors |
964b44c3 | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
964b44c3 | 7 | */ |
8 | ||
9 | /* | |
10 | * The ESI Libxml2 parser is Copyright (c) 2004 by Joachim Bauch | |
11 | * http://www.joachim-bauch.de | |
12 | * mail@joachim-bauch.de | |
13 | */ | |
14 | ||
582c2af2 | 15 | #include "squid.h" |
964b44c3 | 16 | |
95cd9022 | 17 | #if USE_SQUID_ESI && HAVE_LIBXML2 |
964b44c3 | 18 | |
f99c2cfe | 19 | #include "esi/Libxml2Parser.h" |
964b44c3 | 20 | |
21 | // the global document that will store the resolved entity | |
22 | // definitions | |
23 | static htmlDocPtr entity_doc = NULL; | |
24 | ||
019db3c6 | 25 | EsiParserDefinition(ESILibxml2Parser); |
c2d4889f | 26 | |
964b44c3 | 27 | // the SAX callback functions |
28 | void esi_startElementSAXFunc(void * ctx, const xmlChar * name, const xmlChar ** atts) | |
29 | { | |
30 | int count=0; | |
31 | xmlChar **tmp = (xmlChar **)atts; | |
32 | ||
33 | while (tmp && *tmp != NULL) { | |
cb4185f1 FC |
34 | ++count; |
35 | ++tmp; | |
964b44c3 | 36 | } |
37 | ||
38 | // we increased on every key and value | |
39 | count /= 2; | |
40 | ||
41 | ESILibxml2Parser *p = (ESILibxml2Parser *)ctx; | |
42 | ||
43 | p->getClient()->start((const char *)name, (const char **)atts, count); | |
44 | } | |
45 | ||
46 | void esi_endElementSAXFunc(void * ctx, const xmlChar * name) | |
47 | { | |
48 | ESILibxml2Parser *p = (ESILibxml2Parser *)ctx; | |
49 | p->getClient()->end((const char *)name); | |
50 | } | |
51 | ||
52 | void esi_commentSAXFunc(void * ctx, const xmlChar * value) | |
53 | { | |
54 | ESILibxml2Parser *p = (ESILibxml2Parser *)ctx; | |
55 | p->getClient()->parserComment((const char *)value); | |
56 | } | |
57 | ||
58 | void esi_charactersSAXFunc(void *ctx, const xmlChar *ch, int len) | |
59 | { | |
60 | ESILibxml2Parser *p = (ESILibxml2Parser *)ctx; | |
61 | p->getClient()->parserDefault((const char *)ch, len); | |
62 | } | |
63 | ||
64 | xmlEntityPtr esi_getEntitySAXFunc(void * ctx, const xmlChar * name) | |
65 | { | |
66 | xmlEntityPtr res = xmlGetDocEntity(entity_doc, name); | |
67 | ||
68 | if (res == NULL) { | |
69 | const htmlEntityDesc *ent = htmlEntityLookup(name); | |
70 | ||
71 | if (ent != NULL) { | |
72 | char tmp[32]; | |
da783331 | 73 | snprintf(tmp, 32, "&#%d;", ent->value); |
964b44c3 | 74 | res = xmlAddDocEntity(entity_doc, (const xmlChar *)name, XML_INTERNAL_GENERAL_ENTITY, NULL, NULL, (const xmlChar *)tmp); |
75 | } | |
76 | } | |
77 | ||
78 | return res; | |
79 | } | |
80 | ||
81 | ESILibxml2Parser::ESILibxml2Parser(ESIParserClient *aClient) : theClient (aClient) | |
82 | { | |
83 | xmlSAXHandler sax; | |
84 | htmlDefaultSAXHandlerInit(); | |
85 | memset(&sax, 0, sizeof(sax)); | |
86 | sax.startElement = esi_startElementSAXFunc; | |
87 | sax.endElement = esi_endElementSAXFunc; | |
88 | sax.comment = esi_commentSAXFunc; | |
89 | sax.characters = esi_charactersSAXFunc; | |
90 | sax.getEntity = esi_getEntitySAXFunc; | |
91 | ||
92 | /* TODO: grab the document encoding from the headers */ | |
93 | parser = xmlCreatePushParserCtxt(&sax, static_cast<void *>(this), NULL, 0, NULL); | |
94 | xmlSetFeature(parser, "substitute entities", 0); | |
95 | ||
96 | if (entity_doc == NULL) | |
97 | entity_doc = htmlNewDoc(NULL, NULL); | |
98 | } | |
99 | ||
100 | ESILibxml2Parser::~ESILibxml2Parser() | |
101 | { | |
102 | xmlFreeParserCtxt(parser); | |
103 | parser = NULL; | |
104 | } | |
105 | ||
106 | bool | |
107 | ESILibxml2Parser::parse(char const *dataToParse, size_t const lengthOfData, bool const endOfStream) | |
108 | { | |
109 | return (xmlParseChunk(parser, dataToParse, lengthOfData, endOfStream) == 0); | |
110 | } | |
111 | ||
137a13ea | 112 | long int |
964b44c3 | 113 | ESILibxml2Parser::lineNumber() const |
114 | { | |
137a13ea | 115 | return (long int)xmlSAX2GetLineNumber(parser); |
964b44c3 | 116 | } |
117 | ||
118 | char const * | |
119 | ESILibxml2Parser::errorString() const | |
120 | { | |
121 | xmlErrorPtr error = xmlGetLastError(); | |
122 | ||
123 | if (error == NULL) | |
124 | return NULL; | |
125 | ||
126 | return error->message; | |
127 | } | |
da783331 AJ |
128 | |
129 | #endif /* USE_SQUID_ESI */ | |
f53969cc | 130 |