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
|
#include <signal.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <utility>
#include <string>
#include "workflow/HttpMessage.h"
#include "workflow/HttpUtil.h"
#include "workflow/WFHttpServer.h"
#include "workflow/WFTaskFactory.h"
#include "workflow/Workflow.h"
#include "workflow/WFFacilities.h"
using namespace protocol;
void pread_callback(WFFileIOTask *task)
{
FileIOArgs *args = task->get_args();
long ret = task->get_retval();
HttpResponse *resp = (HttpResponse *)task->user_data;
close(args->fd);
if (task->get_state() != WFT_STATE_SUCCESS || ret < 0)
{
resp->set_status_code("503");
resp->append_output_body("<html>503 Internal Server Error.</html>");
}
else /* Use '_nocopy' carefully. */
resp->append_output_body_nocopy(args->buf, ret);
}
void process(WFHttpTask *server_task, const char *root)
{
HttpRequest *req = server_task->get_req();
HttpResponse *resp = server_task->get_resp();
const char *uri = req->get_request_uri();
const char *p = uri;
printf("Request-URI: %s\n", uri);
while (*p && *p != '?')
p++;
std::string abs_path(uri, p - uri);
abs_path = root + abs_path;
if (abs_path.back() == '/')
abs_path += "index.html";
resp->add_header_pair("Server", "Sogou C++ Workflow Server");
int fd = open(abs_path.c_str(), O_RDONLY);
if (fd >= 0)
{
size_t size = lseek(fd, 0, SEEK_END);
void *buf = malloc(size); /* As an example, assert(buf != NULL); */
WFFileIOTask *pread_task;
pread_task = WFTaskFactory::create_pread_task(fd, buf, size, 0,
pread_callback);
/* To implement a more complicated server, please use series' context
* instead of tasks' user_data to pass/store internal data. */
pread_task->user_data = resp; /* pass resp pointer to pread task. */
server_task->user_data = buf; /* to free() in callback() */
server_task->set_callback([](WFHttpTask *t){ free(t->user_data); });
series_of(server_task)->push_back(pread_task);
}
else
{
resp->set_status_code("404");
resp->append_output_body("<html>404 Not Found.</html>");
}
}
static WFFacilities::WaitGroup wait_group(1);
void sig_handler(int signo)
{
wait_group.done();
}
int main(int argc, char *argv[])
{
if (argc != 2 && argc != 3 && argc != 5)
{
fprintf(stderr, "%s <port> [root path] [cert file] [key file]\n",
argv[0]);
exit(1);
}
signal(SIGINT, sig_handler);
unsigned short port = atoi(argv[1]);
const char *root = (argc >= 3 ? argv[2] : ".");
auto&& proc = std::bind(process, std::placeholders::_1, root);
WFHttpServer server(proc);
std::string scheme;
int ret;
if (argc == 5)
{
ret = server.start(port, argv[3], argv[4]); /* https server */
scheme = "https://";
}
else
{
ret = server.start(port);
scheme = "http://";
}
if (ret < 0)
{
perror("start server");
exit(1);
}
/* Test the server. */
auto&& create = [&scheme, port](WFRepeaterTask *)->SubTask *{
char buf[1024];
*buf = '\0';
printf("Input file name: (Ctrl-D to exit): ");
scanf("%1023s", buf);
if (*buf == '\0')
{
printf("\n");
return NULL;
}
std::string url = scheme + "127.0.0.1:" + std::to_string(port) + "/" + buf;
WFHttpTask *task = WFTaskFactory::create_http_task(url, 0, 0,
[](WFHttpTask *task) {
auto *resp = task->get_resp();
if (strcmp(resp->get_status_code(), "200") == 0)
{
std::string body = protocol::HttpUtil::decode_chunked_body(resp);
fwrite(body.c_str(), body.size(), 1, stdout);
printf("\n");
}
else
{
printf("%s %s\n", resp->get_status_code(), resp->get_reason_phrase());
}
});
return task;
};
WFFacilities::WaitGroup wg(1);
WFRepeaterTask *repeater;
repeater = WFTaskFactory::create_repeater_task(create, [&wg](WFRepeaterTask *) {
wg.done();
});
repeater->start();
wg.wait();
server.stop();
return 0;
}
|
