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