Annotation of parser3/src/main/pa_xml_io.C, revision 1.3
1.1 paf 1: /** @file
2: Parser: plugins to xml library, controlling i/o; implementation
3:
4: Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
6: */
7:
8: #include "pa_xml_io.h"
9:
10: #ifdef XML
11:
1.3 ! paf 12: static const char * const IDENT="$Date: 2003/11/27 15:10:01 $";
1.1 paf 13:
14: #include "libxslt/extensions.h"
15:
16: #include "pa_globals.h"
17: #include "pa_request.h"
18:
19: /**
20: * xmlFileMatchWithLocalhostEqDocumentRoot:
21: * filename: the URI for matching
22: *
23: * check if the URI matches an HTTP one
24: *
25: * Returns 1 if matches, 0 otherwise
26: */
27: static int
28: xmlFileMatchLocalhost(const char* filename) {
29: if (!strncmp(filename, "http://localhost", 16))
30: return(1);
31: return(0);
32: }
33:
34:
35: /**
36: * xmlFileOpenHttpLocalhost :
37: * filename: the URI for matching
38: *
39: * http://localhost/abc -> $ENV{DOCUMENT_ROOT}/abc | ./abc
40: *
41: * input from FILE *, supports compressed input
42: * if filename is " " then the standard input is used
43: *
44: * Returns an I/O context or NULL in case of error
45: */
46: static void *
47: xmlFileOpenLocalhost (const char* filename) {
48: //_asm int 3;
49: FILE *fd;
50: const char* document_root=pa_thread_request().request_info.document_root;
51: if(!document_root)
52: document_root=".";
53:
54: char path[MAX_STRING];
55: path[0]=0;
56: strcat(path, document_root);
57: strcat(path, &filename[16]);
58:
59: #ifdef WIN32
60: fd = fopen(path, "rb");
61: #else
62: fd = fopen(path, "r");
63: #endif /* WIN32 */
64: return((void *) fd);
65: }
66:
67: /**
68: * xmlFileRead:
69: * @context: the I/O context
70: * @buffer: where to drop data
71: * @len: number of bytes to write
72: *
73: * Read @len bytes to @buffer from the I/O channel.
74: *
75: * Returns the number of bytes written
76: */
77: static int
78: pa_xmlFileRead (void * context, char * buffer, int len) {
79: return(fread(&buffer[0], 1, len, (FILE *) context));
80: }
81:
82: /**
83: * xmlFileClose:
84: * @context: the I/O context
85: *
86: * Close an I/O channel
87: */
88: static int
89: pa_xmlFileClose (void * context) {
90: return ( ( fclose((FILE *) context) == EOF ) ? -1 : 0 );
91: }
92:
1.2 paf 93: //////////////////////////
94:
95: #ifndef DOXYGEN
96: struct MemoryStream {
97: const char* m_buf;
98: size_t m_size;
99: size_t m_position;
100:
101: int read(char* a_buffer, size_t a_size) {
102: size_t left=m_size-m_position;
103: if(!left)
104: return 0;
105:
106: size_t to_read=min(a_size, left);
107: memcpy(a_buffer, m_buf, to_read);
1.3 ! paf 108: m_position+=to_read;
1.2 paf 109: return to_read;
110: }
111:
112: };
113: #endif
114:
115: static int
116: xmlFileMatchMethod(const char* filename) {
1.3 ! paf 117: if (!strncmp(filename, "parser://", 9 /*strlen("parser://"), and check xmlFileOpenMethod*/))
1.2 paf 118: return(1);
119: return(0);
120: }
121:
122: /// parser://method/param/here -> ^/abc | ./abc
123: static void *
124: xmlFileOpenMethod (const char* afilename) {
125: //_asm int 3;
126: Request& r=pa_thread_request();
127:
1.3 ! paf 128: char* s=pa_strdup(afilename+9 /*strlen("parser://")*/);
1.2 paf 129: const char* method_cstr=lsplit(&s, '/');
130: const String* method=new String(method_cstr);
1.3 ! paf 131: VString* param=s?new VString(*new String(s)):0;
1.2 paf 132: {
133: Temp_lang temp_lang(r, String::L_XML); // default language: XML
1.3 ! paf 134: Request::Execute_nonvirtual_method_result body=
! 135: r.execute_nonvirtual_method(r.main_class, *method, param, true);
! 136: if(body.string) {
1.2 paf 137: MemoryStream *stream=new(UseGC) MemoryStream;
1.3 ! paf 138: stream->m_buf=body.string->cstr(String::L_UNSPECIFIED);
1.2 paf 139: stream->m_size=strlen(stream->m_buf);
140: return (void*)stream;
141: }
142: }
143:
144: throw Exception(0,
1.3 ! paf 145: new String(afilename),
! 146: "'%s' method not found in %s class",
! 147: method_cstr, MAIN_CLASS_NAME);
1.2 paf 148: }
149:
150: static int
151: pa_xmlFileReadMethod (void * context, //< MemoryStream actually
152: char * buffer, int len)
153: {
154: MemoryStream& stream=*static_cast<MemoryStream*>(context);
155:
156: return stream.read(buffer, len);
157: }
158:
159: /**
160: * xmlFileClose:
161: * @context: the I/O context
162: *
163: * Close an I/O channel
164: */
165: static int
166: pa_xmlFileCloseMethod (void * /*context*/) {
167: return 0;
168: }
169:
170:
1.1 paf 171:
172: void pa_xml_io_init() {
173: // http://localhost/abc -> $ENV{DOCUMENT_ROOT}/abc | ./abc
174: xmlRegisterInputCallbacks(
175: xmlFileMatchLocalhost, xmlFileOpenLocalhost,
176: pa_xmlFileRead, pa_xmlFileClose);
1.2 paf 177:
178: // parser://method/param/here -> ^/abc | ./abc
179: xmlRegisterInputCallbacks(
180: xmlFileMatchMethod, xmlFileOpenMethod,
181: pa_xmlFileReadMethod, pa_xmlFileCloseMethod);
1.1 paf 182: }
183:
184: #endif
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