-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathparse.cc
More file actions
113 lines (101 loc) · 3.13 KB
/
Copy pathparse.cc
File metadata and controls
113 lines (101 loc) · 3.13 KB
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
#include "parse.h"
#include <cctype> // for isspace isalpha
#include <sstream>
http_header* alloc_http_header()
{
http_header* p_http_header = (http_header*)new http_header;
if (p_http_header == NULL)
{
perror("http_header alloc failed");
}
return p_http_header;
}
void free_http_header(http_header* hh)
{
if (hh == NULL)
return;
delete hh;
}
bool parse_http_request(const string& http_request, http_header* result)
{
if (http_request.empty())
{
perror("http_request is empty!");
return false;
}
if (result == NULL)
{
perror("result is NULL, please malloc first!");
return false;
}
// http规定的换行方式是CRLF，即\r\n
// windows下的换行标志是CRLF, UXIX下是\n，因此为了兼容不同平台，
// 都以\n作为换行标志来处理
string lf("\n");
size_t prev = 0, next = 0;
// 此处开始解析http_request
if ((next = http_request.find(lf, prev)) != string::npos)
{
string first_line(http_request.substr(prev, next - prev));
prev = next + 1; // 下一行起始位置
if (string(http_request, next -1, 1) == "\r")
--next;
std::stringstream string_stream(first_line);
string_stream >> (result->method);
string_stream >> (result->url);
string_stream >> (result->version);
}
else
{
perror("parse_http_request error: http_request has"
" not \\n");
return false;
}
string lf2("\n\n");
string crlf2("\r\n\r\n");
size_t pos_lf2 = http_request.find(lf2, prev);
size_t pos_crlf2 = http_request.find(crlf2, prev);
if (pos_lf2 == string::npos && pos_crlf2 == string::npos)
{
perror("parse_http_request error: http_request has"
" not \\r\\n\\r\\n or \\n\\n");
return false;
}
// 解析header
size_t pos = ((pos_lf2 == string::npos) ? pos_crlf2 : pos_lf2);
string buff, key, value;
while(1)
{
next = http_request.find(lf, prev);
// 如果找到的next不超过lf2或者crlf2
if (next <= pos)
{
buff = http_request.substr(prev, next - prev);
size_t end = 0;
// 跳过前置空白字符，达到首部关键字的起始位置
for (; std::isspace(buff[end]); ++end)
;
int beg = end;
// 到达首部关键字的结束位置
for (; buff[end] != ':' && !std::isspace(buff[end]); ++end)
;
key = buff.substr(beg, end - beg);
for (; !std::isalnum(buff[end]); ++end)
;
beg = end;
for (; next != end; ++end)
;
value = buff.substr(beg, end - beg);
result->header.insert(std::make_pair(key, value));
prev = next + 1;
}
else
{
break;
}
}
// 解析请求包的实体（一般不存在）
size_t tmp = (pos_lf2 == string::npos ? 4 : 2);
result->body = http_request.substr(pos + tmp, http_request.size() - pos - tmp);
return true;
}