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commands.cpp
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/**
* @file commands.cpp
* @brief Implementation of various commands
*
* (c) 2013-2014 by Mega Limited, Auckland, New Zealand
*
* This file is part of the MEGA SDK - Client Access Engine.
*
* Applications using the MEGA API must present a valid application key
* and comply with the the rules set forth in the Terms of Service.
*
* The MEGA SDK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* @copyright Simplified (2-clause) BSD License.
*
* You should have received a copy of the license along with this
* program.
*/
#include "mega/types.h"
#include "mega/command.h"
#include "mega/megaapp.h"
#include "mega/fileattributefetch.h"
#include "mega/base64.h"
#include "mega/transferslot.h"
#include "mega/transfer.h"
#include "mega/utils.h"
#include "mega/user.h"
#include "mega.h"
#include "mega/mediafileattribute.h"
namespace mega {
HttpReqCommandPutFA::HttpReqCommandPutFA(MegaClient* client, handle cth, fatype ctype, std::unique_ptr<string> cdata, bool checkAccess)
: data(move(cdata))
{
cmd("ufa");
arg("s", data->size());
if (checkAccess)
{
arg("h", (byte*)&cth, MegaClient::NODEHANDLE);
}
progressreported = 0;
persistent = true; // object will be recycled either for retry or for
// posting to the file attribute server
if (client->usehttps)
{
arg("ssl", 2);
}
th = cth;
type = ctype;
binary = true;
tag = client->reqtag;
}
void HttpReqCommandPutFA::procresult()
{
client->looprequested = true;
Error e;
if (checkError(e, client->json))
{
if (e == API_EAGAIN || e == API_ERATELIMIT)
{
status = REQ_FAILURE;
}
else
{
if (e == API_EACCESS)
{
// create a custom attribute indicating thumbnail can't be restored from this account
Node *n = client->nodebyhandle(th);
char me64[12];
Base64::btoa((const byte*)&client->me, MegaClient::USERHANDLE, me64);
if (n && client->checkaccess(n, FULL) &&
(n->attrs.map.find('f') == n->attrs.map.end() || n->attrs.map['f'] != me64) )
{
LOG_debug << "Restoration of file attributes is not allowed for current user (" << me64 << ").";
n->attrs.map['f'] = me64;
int creqtag = client->reqtag;
client->reqtag = 0;
client->setattr(n);
client->reqtag = creqtag;
}
}
status = REQ_SUCCESS;
return client->app->putfa_result(th, type, e);
}
}
else
{
const char* p = NULL;
for (;;)
{
switch (client->json.getnameid())
{
case 'p':
p = client->json.getvalue();
break;
case EOO:
if (!p)
{
status = REQ_FAILURE;
}
else
{
LOG_debug << "Sending file attribute data";
Node::copystring(&posturl, p);
progressreported = 0;
HttpReq::type = REQ_BINARY;
post(client, data->data(), unsigned(data->size()));
}
return;
default:
if (!client->json.storeobject())
{
status = REQ_SUCCESS;
return client->app->putfa_result(th, type, API_EINTERNAL);
}
}
}
}
}
m_off_t HttpReqCommandPutFA::transferred(MegaClient *client)
{
if (httpiohandle)
{
return client->httpio->postpos(httpiohandle);
}
return 0;
}
CommandGetFA::CommandGetFA(MegaClient *client, int p, handle fahref)
{
part = p;
cmd("ufa");
arg("fah", (byte*)&fahref, sizeof fahref);
if (client->usehttps)
{
arg("ssl", 2);
}
arg("r", 1);
}
void CommandGetFA::procresult()
{
fafc_map::iterator it = client->fafcs.find(part);
client->looprequested = true;
Error e;
if (checkError(e, client->json))
{
if (it != client->fafcs.end())
{
faf_map::iterator fafsit;
for (fafsit = it->second->fafs[0].begin(); fafsit != it->second->fafs[0].end(); )
{
// move from fresh to pending
it->second->fafs[1][fafsit->first] = fafsit->second;
it->second->fafs[0].erase(fafsit++);
}
it->second->e = e;
it->second->req.status = REQ_FAILURE;
}
return;
}
const char* p = NULL;
for (;;)
{
switch (client->json.getnameid())
{
case 'p':
p = client->json.getvalue();
break;
case EOO:
if (it != client->fafcs.end())
{
if (p)
{
Node::copystring(&it->second->posturl, p);
it->second->urltime = Waiter::ds;
it->second->dispatch();
}
else
{
faf_map::iterator fafsit;
for (fafsit = it->second->fafs[0].begin(); fafsit != it->second->fafs[0].end(); )
{
// move from fresh to pending
it->second->fafs[1][fafsit->first] = fafsit->second;
it->second->fafs[0].erase(fafsit++);
}
it->second->e = API_EINTERNAL;
it->second->req.status = REQ_FAILURE;
}
}
return;
default:
if (!client->json.storeobject())
{
faf_map::iterator fafsit;
for (fafsit = it->second->fafs[0].begin(); fafsit != it->second->fafs[0].end(); )
{
// move from fresh to pending
it->second->fafs[1][fafsit->first] = fafsit->second;
it->second->fafs[0].erase(fafsit++);
}
it->second->e = API_EINTERNAL;
it->second->req.status = REQ_FAILURE;
return;
}
}
}
}
CommandAttachFA::CommandAttachFA(MegaClient *client, handle nh, fatype t, handle ah, int ctag)
{
cmd("pfa");
notself(client);
arg("n", (byte*)&nh, MegaClient::NODEHANDLE);
char buf[64];
sprintf(buf, "%u*", t);
Base64::btoa((byte*)&ah, sizeof(ah), strchr(buf + 2, 0));
arg("fa", buf);
h = nh;
type = t;
tag = ctag;
}
CommandAttachFA::CommandAttachFA(MegaClient *client, handle nh, fatype t, const std::string& encryptedAttributes, int ctag)
{
cmd("pfa");
notself(client);
arg("n", (byte*)&nh, MegaClient::NODEHANDLE);
arg("fa", encryptedAttributes.c_str());
h = nh;
type = t;
tag = ctag;
}
void CommandAttachFA::procresult()
{
Error e;
if (!checkError(e, client->json))
{
string fa;
if (client->json.storeobject(&fa))
{
Node* n = client->nodebyhandle(h);
if (n)
{
n->fileattrstring = fa;
n->changed.fileattrstring = true;
client->notifynode(n);
}
return client->app->putfa_result(h, type, fa.c_str());
}
e = API_EINTERNAL;
}
client->app->putfa_result(h, type, e);
}
// request upload target URL
CommandPutFile::CommandPutFile(MegaClient* client, TransferSlot* ctslot, int ms)
{
tslot = ctslot;
cmd("u");
if (client->usehttps)
{
arg("ssl", 2);
}
arg("v", 2);
arg("s", tslot->fa->size);
arg("ms", ms);
// send minimum set of different tree's roots for API to check overquota
set<handle> targetRoots;
bool begun = false;
for (auto &file : tslot->transfer->files)
{
if (!ISUNDEF(file->h))
{
Node *node = client->nodebyhandle(file->h);
if (node)
{
handle rootnode = client->getrootnode(node)->nodehandle;
if (targetRoots.find(rootnode) != targetRoots.end())
{
continue;
}
targetRoots.insert(rootnode);
}
if (!begun)
{
beginarray("t");
begun = true;
}
element((byte*)&file->h, MegaClient::NODEHANDLE);
}
}
if (begun)
{
endarray();
}
else
{
// Target user goes alone, not inside an array. Note: we are skipping this if a)more than two b)the array had been created for node handles
for (auto &file : tslot->transfer->files)
{
if (ISUNDEF(file->h) && file->targetuser.size())
{
arg("t", file->targetuser.c_str());
break;
}
}
}
}
void CommandPutFile::cancel()
{
Command::cancel();
tslot = NULL;
}
// set up file transfer with returned target URL
void CommandPutFile::procresult()
{
if (tslot)
{
tslot->pendingcmd = NULL;
}
else
{
canceled = true;
}
Error e;
if (checkError(e, client->json))
{
if (!canceled)
{
tslot->transfer->failed(e, *client->mTctableRequestCommitter);
}
return;
}
std::vector<std::string> tempurls;
for (;;)
{
switch (client->json.getnameid())
{
case 'p':
tempurls.push_back("");
client->json.storeobject(canceled ? NULL : &tempurls.back());
break;
case EOO:
if (canceled) return;
if (tempurls.size() == 1)
{
tslot->transfer->tempurls = tempurls;
tslot->transferbuf.setIsRaid(tslot->transfer, tempurls, tslot->transfer->pos, tslot->maxRequestSize);
tslot->starttime = tslot->lastdata = client->waiter->ds;
return tslot->progress();
}
else
{
return tslot->transfer->failed(API_EINTERNAL, *client->mTctableRequestCommitter);
}
default:
if (!client->json.storeobject())
{
if (!canceled)
{
tslot->transfer->failed(API_EINTERNAL, *client->mTctableRequestCommitter);
}
return;
}
}
}
}
// request upload target URL for application to upload photo to using eg. iOS background upload feature
CommandPutFileBackgroundURL::CommandPutFileBackgroundURL(m_off_t size, int putmbpscap, int ctag)
{
cmd("u");
arg("ssl", 2); // always SSL for background uploads
arg("v", 2);
arg("s", size);
arg("ms", putmbpscap);
tag = ctag;
}
// set up file transfer with returned target URL
void CommandPutFileBackgroundURL::procresult()
{
string url;
Error e;
if (checkError(e, client->json))
{
if (!canceled)
{
client->app->backgrounduploadurl_result(e, NULL);
}
return;
}
for (;;)
{
switch (client->json.getnameid())
{
case 'p':
client->json.storeobject(canceled ? NULL : &url);
break;
case EOO:
if (canceled) return;
client->app->backgrounduploadurl_result(API_OK, &url);
return;
default:
if (!client->json.storeobject())
{
if (!canceled)
{
client->app->backgrounduploadurl_result(API_EINTERNAL, NULL);
}
return;
}
}
}
}
// request temporary source URL for DirectRead
CommandDirectRead::CommandDirectRead(MegaClient *client, DirectReadNode* cdrn)
{
drn = cdrn;
cmd("g");
arg(drn->p ? "n" : "p", (byte*)&drn->h, MegaClient::NODEHANDLE);
arg("g", 1);
arg("v", 2); // version 2: server can supply details for cloudraid files
if (drn->privateauth.size())
{
arg("esid", drn->privateauth.c_str());
}
if (drn->publicauth.size())
{
arg("en", drn->publicauth.c_str());
}
if (drn->chatauth.size())
{
arg("cauth", drn->chatauth.c_str());
}
if (client->usehttps)
{
arg("ssl", 2);
}
}
void CommandDirectRead::cancel()
{
Command::cancel();
drn = NULL;
}
void CommandDirectRead::procresult()
{
if (drn)
{
drn->pendingcmd = NULL;
}
Error e;
if (checkError(e, client->json))
{
if (!canceled && drn)
{
return drn->cmdresult(e);
}
}
else
{
dstime tl = 0;
std::vector<std::string> tempurls;
for (;;)
{
switch (client->json.getnameid())
{
case 'g':
if (client->json.enterarray()) // now that we are requesting v2, the reply will be an array of 6 URLs for a raid download, or a single URL for the original direct download
{
for (;;)
{
std::string tu;
if (!client->json.storeobject(&tu))
{
break;
}
tempurls.push_back(tu);
}
client->json.leavearray();
}
else
{
std::string tu;
if (client->json.storeobject(&tu))
{
tempurls.push_back(tu);
}
}
if (tempurls.size() == 1 || tempurls.size() == RAIDPARTS)
{
drn->tempurls.swap(tempurls);
e = API_OK;
}
else
{
e = API_EINCOMPLETE;
}
break;
case 's':
if (drn)
{
drn->size = client->json.getint();
}
break;
case 'd':
e = API_EBLOCKED;
break;
case 'e':
e = (error)client->json.getint();
break;
case MAKENAMEID2('t', 'l'):
tl = dstime(client->json.getint());
break;
case EOO:
if (!canceled && drn)
{
if (e == API_EOVERQUOTA && !tl)
{
// default retry interval
tl = MegaClient::DEFAULT_BW_OVERQUOTA_BACKOFF_SECS;
}
drn->cmdresult(e, e == API_EOVERQUOTA ? tl * 10 : 0);
}
return;
default:
if (!client->json.storeobject())
{
if (!canceled && drn)
{
drn->cmdresult(e);
}
return;
}
}
}
}
}
// request temporary source URL for full-file access (p == private node)
CommandGetFile::CommandGetFile(MegaClient *client, TransferSlot* ctslot, const byte* key, handle h, bool p, const char *privateauth, const char *publicauth, const char *chatauth)
{
cmd("g");
arg(p ? "n" : "p", (byte*)&h, MegaClient::NODEHANDLE);
arg("g", 1);
arg("v", 2); // version 2: server can supply details for cloudraid files
if (client->usehttps)
{
arg("ssl", 2);
}
if (privateauth)
{
arg("esid", privateauth);
}
if (publicauth)
{
arg("en", publicauth);
}
if (chatauth)
{
arg("cauth", chatauth);
}
tslot = ctslot;
priv = p;
ph = h;
if (!tslot)
{
memcpy(filekey, key, FILENODEKEYLENGTH);
}
}
void CommandGetFile::cancel()
{
Command::cancel();
tslot = NULL;
}
// process file credentials
void CommandGetFile::procresult()
{
if (tslot)
{
tslot->pendingcmd = NULL;
}
Error e;
if (checkError(e, client->json))
{
if (canceled)
{
return;
}
if (tslot)
{
return tslot->transfer->failed(e, *client->mTctableRequestCommitter);
}
return client->app->checkfile_result(ph, e);
}
const char* at = NULL;
m_off_t s = -1;
dstime tl = 0;
int d = 0;
byte* buf;
m_time_t ts = 0, tm = 0;
// credentials relevant to a non-TransferSlot scenario (node query)
string fileattrstring;
string filenamestring;
string filefingerprint;
std::vector<string> tempurls;
for (;;)
{
switch (client->json.getnameid())
{
case 'g':
if (client->json.enterarray()) // now that we are requesting v2, the reply will be an array of 6 URLs for a raid download, or a single URL for the original direct download
{
for (;;)
{
std::string tu;
if (!client->json.storeobject(&tu))
{
break;
}
tempurls.push_back(tu);
}
client->json.leavearray();
}
else
{
std::string tu;
if (client->json.storeobject(&tu))
{
tempurls.push_back(tu);
}
}
e = API_OK;
break;
case 's':
s = client->json.getint();
break;
case 'd':
d = 1;
break;
case MAKENAMEID2('t', 's'):
ts = client->json.getint();
break;
case MAKENAMEID3('t', 'm', 'd'):
tm = ts + client->json.getint();
break;
case MAKENAMEID2('a', 't'):
at = client->json.getvalue();
break;
case MAKENAMEID2('f', 'a'):
if (tslot)
{
client->json.storeobject(&tslot->fileattrstring);
}
else
{
client->json.storeobject(&fileattrstring);
}
break;
case MAKENAMEID3('p', 'f', 'a'):
if (tslot)
{
tslot->fileattrsmutable = (int)client->json.getint();
}
break;
case 'e':
e = (error)client->json.getint();
break;
case MAKENAMEID2('t', 'l'):
tl = dstime(client->json.getint());
break;
case EOO:
if (d || !at)
{
e = at ? API_EBLOCKED : API_EINTERNAL;
if (canceled)
{
return;
}
if (tslot)
{
return tslot->transfer->failed(e, *client->mTctableRequestCommitter);
}
return client->app->checkfile_result(ph, e);
}
else
{
// decrypt at and set filename
SymmCipher key;
const char* eos = strchr(at, '"');
key.setkey(filekey, FILENODE);
if ((buf = Node::decryptattr(tslot ? tslot->transfer->transfercipher() : &key,
at, eos ? eos - at : strlen(at))))
{
JSON json;
json.begin((char*)buf + 5);
for (;;)
{
switch (json.getnameid())
{
case 'c':
if (!json.storeobject(&filefingerprint))
{
delete[] buf;
if (tslot)
{
return tslot->transfer->failed(API_EINTERNAL, *client->mTctableRequestCommitter);
}
return client->app->checkfile_result(ph, API_EINTERNAL);
}
break;
case 'n':
if (!json.storeobject(&filenamestring))
{
delete[] buf;
if (tslot)
{
return tslot->transfer->failed(API_EINTERNAL, *client->mTctableRequestCommitter);
}
return client->app->checkfile_result(ph, API_EINTERNAL);
}
break;
case EOO:
delete[] buf;
if (tslot)
{
if (s >= 0 && s != tslot->transfer->size)
{
tslot->transfer->size = s;
for (file_list::iterator it = tslot->transfer->files.begin(); it != tslot->transfer->files.end(); it++)
{
(*it)->size = s;
}
if (priv)
{
Node *n = client->nodebyhandle(ph);
if (n)
{
n->size = s;
client->notifynode(n);
}
}
int creqtag = client->reqtag;
client->reqtag = 0;
client->sendevent(99411, "Node size mismatch");
client->reqtag = creqtag;
}
tslot->starttime = tslot->lastdata = client->waiter->ds;
if ((tempurls.size() == 1 || tempurls.size() == RAIDPARTS) && s >= 0)
{
tslot->transfer->tempurls = tempurls;
tslot->transferbuf.setIsRaid(tslot->transfer, tempurls, tslot->transfer->pos, tslot->maxRequestSize);
return tslot->progress();
}
if (e == API_EOVERQUOTA && tl <= 0)
{
// default retry interval
tl = MegaClient::DEFAULT_BW_OVERQUOTA_BACKOFF_SECS;
}
return tslot->transfer->failed(e, *client->mTctableRequestCommitter, e == API_EOVERQUOTA ? tl * 10 : 0);
}
else
{
return client->app->checkfile_result(ph, e, filekey, s, ts, tm,
&filenamestring,
&filefingerprint,
&fileattrstring);
}
default:
if (!json.storeobject())
{
delete[] buf;
if (tslot)
{
return tslot->transfer->failed(API_EINTERNAL, *client->mTctableRequestCommitter);
}
else
{
return client->app->checkfile_result(ph, API_EINTERNAL);
}
}
}
}
}
if (canceled)
{
return;
}
if (tslot)
{
return tslot->transfer->failed(API_EKEY, *client->mTctableRequestCommitter);
}
else
{
return client->app->checkfile_result(ph, API_EKEY);
}
}
default:
if (!client->json.storeobject())
{
if (tslot)
{
return tslot->transfer->failed(API_EINTERNAL, *client->mTctableRequestCommitter);
}
else
{
return client->app->checkfile_result(ph, API_EINTERNAL);
}
}
}
}
}
CommandSetAttr::CommandSetAttr(MegaClient* client, Node* n, SymmCipher* cipher, const char* prevattr)
{
cmd("a");
notself(client);
string at;
n->attrs.getjson(&at);
client->makeattr(cipher, &at, at.c_str(), int(at.size()));
arg("n", (byte*)&n->nodehandle, MegaClient::NODEHANDLE);
arg("at", (byte*)at.c_str(), int(at.size()));
h = n->nodehandle;
tag = client->reqtag;
syncop = prevattr;
if(prevattr)
{
pa = prevattr;
}
}
void CommandSetAttr::procresult()
{
Error e;
if (checkError(e, client->json))
{
#ifdef ENABLE_SYNC
if(!e && syncop)
{
Node* node = client->nodebyhandle(h);
if(node)
{
Sync* sync = NULL;
for (sync_list::iterator it = client->syncs.begin(); it != client->syncs.end(); it++)
{
if((*it)->tag == tag)
{
sync = (*it);
break;
}
}
if(sync)
{
client->app->syncupdate_remote_rename(sync, node, pa.c_str());
}
}
}
#endif
client->app->setattr_result(h, e);
}