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psyced/world/net/http/xmlrpc.c

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2009-01-26 20:12:53 +00:00
// $Id: xmlrpc.c,v 1.24 2008/04/22 22:43:14 lynx Exp $ // vim:syntax=lpc
//
// TODO: shares to much code with url fetcher
// in the ideal world this would only contain marshal/unmarshal code
// for xmlrpc
// possibly we can come up with an marshal/unmarshal api and use
// the same framework for xml-rpc, soap and other things
//
#include <ht/http.h>
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#include <net.h>
#include <url.h>
#include <xml.h>
#include <lpctypes.h>
virtual inherit NET_PATH "output"; // virtual: in case we get inherited..
inherit NET_PATH "http/fetch";
inherit NET_PATH "xml/parse";
volatile string postbody;
volatile closure callback;
int parse_status(string all);
int parse_header(string all);
int buffer_content(string all);
// recursively dump a structure
dump(mixed value) {
/* TODO: what happens if we feed a recursive structure here? */
string t;
switch(typeof(value)) {
case T_NUMBER:
return sprintf("<value><int>%d</int></value>", value);
case T_FLOAT:
return sprintf("<value><double>%O</double></value>", value);
case T_STRING:
// in theory we would have to convert this to utf-8!
// must to encode '<' and '&'
return sprintf("<value><string>%s</string></value>", value);
case T_MAPPING: // -> struct
// NOTE: THIS DOES NOT SUPPORT mappings with m_width > 2
t = "<value><struct>\n";
foreach(string key, mixed val : value) {
t += sprintf("<member>\n"
"<name>%s</name>\n"
"%s\n"
"</member>\n",
key, dump(val));
}
t += "</struct></value>";
return t;
case T_POINTER: // array
t = "<value><array><data>\n";
foreach(mixed val : value) {
t += dump(val) + "\n";
}
t += "</data></array></value>";
return t;
default:
PT(("do not know how to serialize %O type %d\n", value, typeof(value)))
PT(("yes, this is a bug!\n"))
break;
}
return "";
}
marshal(params) {
string s = "<params>\n";
foreach(mixed param : params) {
s += sprintf("<param>\n%s\n</param>\n", dump(param));
}
return s + "</params>\n";
}
void fetch(string murl) {
if (url) return;
url = murl;
}
void request(string method, mixed params, closure cb) { // TODO: errback API
if (fetching) {
enqueue(ME, ({ method, params, cb }));
return;
}
callback = cb;
postbody = sprintf("<?xml version='1.0'?>\n"
"<methodCall>\n"
"<methodName>%s</methodName>\n"
"%s\n"
// last is a \r\n!
"</methodCall>\r\n", method, marshal(params));
P3(("%O: request(%O)\n", ME, url))
connect();
}
int logon(int arg) {
buffer = "";
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headers = ([ ]);
http_status = 500;
// this is all not https: compatible..
unless(::logon(arg, 1)) return -1;
unless (url) return -3;
unless (resource) sscanf(url, "http://%s/%s", host, resource);
// do somthing
emit("POST /" + resource + " HTTP/1.0\r\n"
+ "Host: " + host + "\r\n"
+ "Content-Type: text/xml\r\n"
+ "Content-Length: " + sizeof(postbody) + "\r\n");
emit("\r\n");
//+ "User-Agent: " + SERVER_VERSION + "\r\n");
emit(postbody);
next_input_to(#'parse_status);
return 0; // duh.
}
mixed * innerMarshal(mixed val) {
mixed args;
string type;
// TODO: methodSignature behaves strangely
XMLNode value;
foreach(mixed key, mixed vval : val) {
if (stringp(key) && key[0] == '/') {
type = key[1..];
value = val[key];
break;
}
}
switch(type) {
case "boolean": // map to 0, 1
// should probably check if this string is really "0" or "1"
case "int":
return ({ to_int(value[Cdata]) });
case "double":
// sigh... this is not double
return ({ to_float(value[Cdata]) });
case "dateTime.iso8601": // uhm... what do we map this to?
// unix timestamp probably?
break;
case "base64":
// probably containing binary data
return ({ decode_base64(value[Cdata]) });
// these two are complicated
case "array":
args = ({ });
value = value["/data"]["/value"];
unless(nodelistp(value)) value = ({ value });
foreach(mixed v : value) {
args += innerMarshal(v);
}
return ({ args });
case "struct": // mapping
args = ([ ]);
unless(nodelistp(value["/member"]))
value["/member"] = ({ value["/member"] });
foreach(mixed v: value["/member"]) {
args[v["/name"][Cdata]] = innerMarshal(v["/value"])[0];
}
return ({ args });
case "fault": // something is wrong
break;
default: // if no type is indicated, the type is string
case "string": // utf-8 encoded!
return ({ value[Cdata] });
}
return ({ });
}
mixed unMarshal(XMLNode parsed) {
XMLNode params;
mixed *helper;
mixed args = ({ }); // could be pre-allocated
unless(parsed["/fault"]) {
if (parsed["/params"]) {
params = parsed["/params"]["/param"];
} else {
params = ({ });
}
unless(nodelistp(params)) params = ({ params }); // special case
foreach(mixed param : params) {
args += innerMarshal(param["/value"]);
}
// should probably watch for HTTP 200
return args;
} else {
// TODO: fault handling
return -1;
}
}
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int disconnected(string remainder) {
mixed *args;
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headers["_fetchtime"] = isotime(ctime(time()), 1);
if (headers["last-modified"])
modificationtime = headers["last-modified"];
if (headers["etag"])
etag = headers["etag"]; // heise does not work with etag
fetched = buffer;
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fheaders = headers;
buffer = headers = 0;
fetching = 0;
if (pointerp(args)) // no fault
funcall(callback, args...);
if (qSize(ME)) {
args = shift(ME);
call_out(#'request, 0, args...); // at next heart_beat
// request(args...);
}
return 1; // kind of expected
}
// helper methods, useful at least for ORA meerkat
// could do caching for these things
void listMethods(closure cb) {
request("system.listMethods", ({ }), cb);
}
void methodHelp(string method, closure cb) {
request("system.methodHelp", ({ method }), cb);
}
void methodSignature(string method, closure cb) {
request("system.methodSignature", ({ method }), cb);
}
varargs string content(closure cb, int force, int willbehave) { return ""; } // makes no sense
create() {
qCreate();
qInit(ME, 150, 5);
#ifdef MODULE_TESTS
selftest();
#endif
}
/*--------------------------------------------------------------------
* MODULE TESTS
* you should run them whenever you change the code
* if they fail, debug!
* do not check in code that does not pass the tests
*--------------------------------------------------------------------*/
#ifdef MODULE_TESTS
// automatic test cases
// add some if you like
selftest() {
// self tests...
// be careful, the order for structs is not guaranteed
int i, result;
mixed *structures = ({
({ 1, 2, 3, 4 }),
// ({ (["a" : 1, "b" : "boo" ]) }),
({ 1, 1.5, "a", ({ 1 }), (["a" : "foo" ]) })
});
mixed *strings = ({
"<params>\n<param>\n<value><int>1</int></value>\n</param>\n<param>\n<value><int>2</int></value>\n</param>\n<param>\n<value><int>3</int></value>\n</param>\n<param>\n<value><int>4</int></value>\n</param>\n</params>\n",
// "<params>\n<param>\n<value><struct>\n<member>\n<name>a</name>\n<value><int>1</int></value>\n</member>\n<member>\n<name>b</name>\n<value><string>boo</string></value>\n</member>\n</struct></value>\n</param>\n</params>\n",
"<params>\n<param>\n<value><int>1</int></value>\n</param>\n<param>\n<value><double>1.5</double></value>\n</param>\n<param>\n<value><string>a</string></value>\n</param>\n<param>\n<value><array><data>\n<value><int>1</int></value>\n</data></array></value>\n</param>\n<param>\n<value><struct>\n<member>\n<name>a</name>\n<value><string>foo</string></value>\n</member>\n</struct></value>\n</param>\n</params>\n"
});
i = 0;
foreach(mixed test : structures) {
result = marshal(test) == strings[i];
if (result) {
PT(("passed marshal test %d\n", i))
} else {
PT(("marshal test %d failed\n", i))
PT(("%O\n%O\n", marshal(test), strings[i]))
break;
}
i++;
}
i = 0;
foreach(mixed test : strings) {
// set callback internally! it is safe to do so as we are
// doing only synchronus operations
XMLNode x = new_XMLNode;
x["/params"] = xmlparse(test);
result = sprintf("%O", unMarshal(x)) == sprintf("%O", structures[i]);
if (result) {
PT(("passed unmarshal test %d\n", i))
} else {
PT(("unmarshal test %d failed\n", i))
PT(("%O\n%O\n", unMarshal(x), structures[i]))
break;
}
i++;
}
}
#endif