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using Xmpp;
using Xmpp.Xep;
using Gee;
namespace Xmpp.Xep.HttpFileUpload {
private const string NS_URI = "urn:xmpp:http:upload";
private const string NS_URI_0 = "urn:xmpp:http:upload:0";
public errordomain HttpFileTransferError {
SLOT_REQUEST
}
public class Module : XmppStreamModule {
public static Xmpp.ModuleIdentity<Module> IDENTITY = new Xmpp.ModuleIdentity<Module>(NS_URI, "0363_http_file_upload");
public signal void feature_available(XmppStream stream, long max_file_size);
public signal void received_url(XmppStream stream, MessageStanza message);
public delegate void OnSlotOk(XmppStream stream, string url_get, string url_put);
public delegate void OnError(XmppStream stream, string error);
public struct SlotResult {
public string url_get { get; set; }
public string url_put { get; set; }
public HashMap<string, string> headers { get; set; }
}
public async SlotResult request_slot(XmppStream stream, string filename, int64 file_size, string? content_type) throws HttpFileTransferError {
Flag? flag = stream.get_flag(Flag.IDENTITY);
if (flag == null) {
throw new HttpFileTransferError.SLOT_REQUEST("No flag");
}
StanzaNode? request_node = null;
switch (flag.ns_ver) {
case NS_URI_0:
request_node = new StanzaNode.build("request", NS_URI_0).add_self_xmlns();
request_node.put_attribute("filename", filename).put_attribute("size", file_size.to_string());
if (content_type != null) request_node.put_attribute("content-type", content_type);
break;
case NS_URI:
request_node = new StanzaNode.build("request", NS_URI).add_self_xmlns()
.put_node(new StanzaNode.build("filename", NS_URI).put_node(new StanzaNode.text(filename)))
.put_node(new StanzaNode.build("size", NS_URI).put_node(new StanzaNode.text(file_size.to_string())));
if (content_type != null) {
request_node.put_node(new StanzaNode.build("content-type", NS_URI).put_node(new StanzaNode.text(content_type)));
}
break;
}
SourceFunc callback = request_slot.callback;
var slot_result = SlotResult();
Iq.Stanza iq = new Iq.Stanza.get(request_node) { to=flag.file_store_jid };
HttpFileTransferError? e = null;
stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq, (stream, iq) => {
if (iq.is_error()) {
e = new HttpFileTransferError.SLOT_REQUEST("Error getting upload/download url (Error Iq)");
Idle.add((owned) callback);
return;
}
string? url_get = null, url_put = null;
// FIXME change back to switch on version in a while (prosody bug)
url_get = iq.stanza.get_deep_attribute(flag.ns_ver + ":slot", flag.ns_ver + ":get", flag.ns_ver + ":url");
url_put = iq.stanza.get_deep_attribute(flag.ns_ver + ":slot", flag.ns_ver + ":put", flag.ns_ver + ":url");
if (url_get == null && url_put == null) {
url_get = iq.stanza.get_deep_string_content(flag.ns_ver + ":slot", flag.ns_ver + ":get");
url_put = iq.stanza.get_deep_string_content(flag.ns_ver + ":slot", flag.ns_ver + ":put");
}
if (url_get == null || url_put == null) {
e = new HttpFileTransferError.SLOT_REQUEST("Error getting upload/download url: %s".printf(iq.stanza.to_string()));
Idle.add((owned) callback);
return;
}
slot_result.headers = new HashMap<string, string>();
foreach (StanzaNode node in iq.stanza.get_deep_subnodes(flag.ns_ver + ":slot", flag.ns_ver + ":put", flag.ns_ver + ":header")) {
string header_name = node.get_attribute("name");
if (header_name == "Authorization" || header_name == "Cookie" || header_name == "Expires") {
string? header_val = node.get_string_content();
if (header_val != null && header_val.length < 8192) {
header_val = header_val.replace("\n", "").replace("\r", "");
slot_result.headers[header_name] = header_val;
}
}
}
slot_result.url_get = url_get;
slot_result.url_put = url_put;
Idle.add((owned) callback);
});
yield;
if (e != null) {
throw e;
}
return slot_result;
}
public override void attach(XmppStream stream) {
stream.stream_negotiated.connect(query_availability);
}
public override void detach(XmppStream stream) {
stream.stream_negotiated.disconnect(query_availability);
}
public override string get_ns() { return NS_URI; }
public override string get_id() { return IDENTITY.id; }
private async void query_availability(XmppStream stream) {
ServiceDiscovery.InfoResult? info_result = yield stream.get_module(ServiceDiscovery.Module.IDENTITY).request_info(stream, stream.remote_name);
bool available = check_ns_in_info(stream, stream.remote_name, info_result);
if (!available) {
ServiceDiscovery.ItemsResult? items_result = yield stream.get_module(ServiceDiscovery.Module.IDENTITY).request_items(stream, stream.remote_name);
if (items_result == null) return;
for (int i = 0; i < 2; i++) {
foreach (Xep.ServiceDiscovery.Item item in items_result.items) {
// First try the promising items and only afterwards all the others
bool promising_upload_item = item.jid.to_string().has_prefix("upload");
if ((i == 0 && !promising_upload_item) || (i == 1) && promising_upload_item) continue;
ServiceDiscovery.InfoResult? info_result2 = yield stream.get_module(ServiceDiscovery.Module.IDENTITY).request_info(stream, item.jid);
bool available2 = check_ns_in_info(stream, item.jid, info_result2);
if (available2) return;
}
}
}
}
private bool check_ns_in_info(XmppStream stream, Jid jid, Xep.ServiceDiscovery.InfoResult? info_result) {
if (info_result == null) return false;
bool ver_available = false;
bool ver_0_available = false;
foreach (string feature in info_result.features) {
if (feature == NS_URI_0) {
ver_0_available = true;
break;
} else if (feature == NS_URI) {
ver_available = true;
}
}
if (ver_available || ver_0_available) {
long max_file_size = extract_max_file_size(info_result);
if (ver_0_available) {
stream.add_flag(new Flag(jid, NS_URI_0));
} else if (ver_available) {
stream.add_flag(new Flag(jid, NS_URI));
}
feature_available(stream, max_file_size);
return true;
}
return false;
}
private long extract_max_file_size(Xep.ServiceDiscovery.InfoResult info_result) {
string? max_file_size_str = null;
Gee.List<StanzaNode> x_nodes = info_result.iq.stanza.get_deep_subnodes("http://jabber.org/protocol/disco#info:query", "jabber:x:data:x");
foreach(StanzaNode x_node in x_nodes) {
Gee.List<StanzaNode> field_nodes = x_node.get_subnodes("field", "jabber:x:data");
foreach (StanzaNode node in field_nodes) {
string? var_attr = node.get_attribute("var");
if (var_attr == "max-file-size") {
StanzaNode value_node = node.get_subnode("value", "jabber:x:data");
max_file_size_str = value_node.get_string_content();
break;
}
}
}
if (max_file_size_str != null) return long.parse(max_file_size_str);
return -1;
}
}
public class ReceivedPipelineListener : StanzaListener<MessageStanza> {
private const string[] after_actions_const = {"EXTRACT_MESSAGE_2"};
public override string action_group { get { return "EXTRACT_MESSAGE_2"; } }
public override string[] after_actions { get { return after_actions_const; } }
public override async bool run(XmppStream stream, MessageStanza message) {
string? oob_url = OutOfBandData.get_url_from_message(message);
if (oob_url != null && oob_url == message.body) {
stream.get_module(Module.IDENTITY).received_url(stream, message);
}
return false;
}
}
public class Flag : XmppStreamFlag {
public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "http_file_upload");
public Jid file_store_jid;
public string ns_ver;
public int? max_file_size;
public Flag(Jid file_store_jid, string ns_ver) {
this.file_store_jid = file_store_jid;
this.ns_ver = ns_ver;
}
public override string get_ns() { return NS_URI; }
public override string get_id() { return IDENTITY.id; }
}
}
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