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
|
// List recently-released Linux applications. (Written in C++.)
// For more details about O'Reilly's excellent Meerkat news service, see:
// http://www.oreillynet.com/pub/a/rss/2000/11/14/meerkat_xmlrpc.html */
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
#include <xmlrpc-c/oldcppwrapper.hpp>
#define NAME "XML-RPC C++ Meerkat Query Demo"
#define VERSION "0.1"
#define MEERKAT_URL "http://www.oreillynet.com/meerkat/xml-rpc/server.php"
#define SOFTWARE_LINUX (6)
static void
list_apps(unsigned int const hours) {
// Build our time_period parameter.
ostringstream time_period_stream;
time_period_stream << hours << "HOUR";
string const time_period(time_period_stream.str());
// Assemble our meerkat query recipe.
XmlRpcValue recipe = XmlRpcValue::makeStruct();
recipe.structSetValue("category", XmlRpcValue::makeInt(SOFTWARE_LINUX));
recipe.structSetValue("time_period", XmlRpcValue::makeString(time_period));
recipe.structSetValue("descriptions", XmlRpcValue::makeInt(76));
// Build our parameter array.
XmlRpcValue param_array(XmlRpcValue::makeArray());
param_array.arrayAppendItem(recipe);
// Create a client pointing to Meerkat.
XmlRpcClient meerkat(MEERKAT_URL);
// Perform the query.
XmlRpcValue const apps(meerkat.call("meerkat.getItems", param_array));
// Print our results.
size_t const app_count(apps.arraySize());
bool first;
size_t i;
for (i = 0, first=false; i < app_count; ++i, first = false) {
XmlRpcValue const app(apps.arrayGetItem(i));
// Get some information about our application.
string const title(app.structGetValue("title").getString());
string const link(app.structGetValue("link").getString());
string const description(
app.structGetValue("description").getString());
// Print a separator line if necessary.
if (!first)
cout << endl;
// Print this application entry.
if (description.size() > 0)
cout << title << endl << description << endl << link << endl;
else
cout << title << endl << description << endl << link << endl;
}
}
int
main(int argc, char **argv) {
int retval;
unsigned int hours;
// Parse our command-line arguments.
if (argc == 1) {
hours = 25;
} else if (argc == 2) {
hours = atoi(argv[1]);
}
if (hours == 0) {
cerr << "Hours must be positive" << endl;
exit(1);
}
if (hours > 49) {
cerr << "It's not nice to ask for > 49 hours at once." << endl;
exit(1);
}
// Start up our client library.
XmlRpcClient::Initialize(NAME, VERSION);
// Call our implementation, and watch out for faults.
try {
list_apps(hours);
retval = 0;
} catch (XmlRpcFault& fault) {
cerr << argv[0] << ": XML-RPC fault #" << fault.getFaultCode()
<< ": " << fault.getFaultString() << endl;
retval = 1;
}
// Shut down our client library.
XmlRpcClient::Terminate();
return retval;
}
|
