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linphone-ios/src/chat/modifier/file-transfer-chat-message-modifier.cpp

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/*
* file-transfer-chat-message-modifier.cpp
* Copyright (C) 2010-2018 Belledonne Communications SARL
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "linphone/api/c-content.h"
#include "address/address.h"
#include "bctoolbox/crypto.h"
#include "c-wrapper/c-wrapper.h"
#include "chat/chat-message/chat-message-p.h"
#include "chat/chat-room/chat-room-p.h"
#include "content/content-type.h"
#include "content/content.h"
#include "core/core.h"
#include "logger/logger.h"
#include "file-transfer-chat-message-modifier.h"
// =============================================================================
using namespace std;
LINPHONE_BEGIN_NAMESPACE
FileTransferChatMessageModifier::FileTransferChatMessageModifier (belle_http_provider_t *prov) : provider(prov) {
bgTask.setName("File transfer upload");
}
belle_http_request_t *FileTransferChatMessageModifier::getHttpRequest () const {
return httpRequest;
}
void FileTransferChatMessageModifier::setHttpRequest (belle_http_request_t *request) {
httpRequest = request;
}
FileTransferChatMessageModifier::~FileTransferChatMessageModifier () {
if (isFileTransferInProgressAndValid())
cancelFileTransfer(); //to avoid body handler to still refference zombie FileTransferChatMessageModifier
else
releaseHttpRequest();
}
ChatMessageModifier::Result FileTransferChatMessageModifier::encode (const shared_ptr<ChatMessage> &message, int &errorCode) {
chatMessage = message;
currentFileContentToTransfer = nullptr;
// For each FileContent, upload it and create a FileTransferContent
for (Content *content : message->getContents()) {
if (content->isFile()) {
lInfo() << "Found file content, set it for file upload";
FileContent *fileContent = (FileContent *)content;
currentFileContentToTransfer = fileContent;
break;
}
}
if (!currentFileContentToTransfer)
return ChatMessageModifier::Result::Skipped;
/* Open a transaction with the server and send an empty request(RCS5.1 section 3.5.4.8.3.1) */
if (uploadFile() == 0)
return ChatMessageModifier::Result::Suspended;
return ChatMessageModifier::Result::Error;
}
// ----------------------------------------------------------
static void _chat_message_file_transfer_on_progress (
belle_sip_body_handler_t *bh,
belle_sip_message_t *m,
void *data,
size_t offset,
size_t total
) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->fileTransferOnProgress(bh, m, offset, total);
}
void FileTransferChatMessageModifier::fileTransferOnProgress (
belle_sip_body_handler_t *bh,
belle_sip_message_t *m,
size_t offset,
size_t total
) {
if (!isFileTransferInProgressAndValid()) {
releaseHttpRequest();
return;
}
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
LinphoneChatMessage *msg = L_GET_C_BACK_PTR(message);
LinphoneChatMessageCbs *cbs = linphone_chat_message_get_callbacks(msg);
LinphoneContent *content = L_GET_C_BACK_PTR((Content *)currentFileContentToTransfer);
if (linphone_chat_message_cbs_get_file_transfer_progress_indication(cbs)) {
linphone_chat_message_cbs_get_file_transfer_progress_indication(cbs)(msg, content, offset, total);
} else {
// Legacy: call back given by application level.
linphone_core_notify_file_transfer_progress_indication(message->getCore()->getCCore(), msg, content, offset, total);
}
}
static int _chat_message_on_send_body (
belle_sip_user_body_handler_t *bh,
belle_sip_message_t *m,
void *data,
size_t offset,
uint8_t *buffer,
size_t *size
) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
return d->onSendBody(bh, m, offset, buffer, size);
}
int FileTransferChatMessageModifier::onSendBody (
belle_sip_user_body_handler_t *bh,
belle_sip_message_t *m,
size_t offset,
uint8_t *buffer,
size_t *size
) {
int retval = -1;
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return BELLE_SIP_STOP;
LinphoneChatMessage *msg = L_GET_C_BACK_PTR(message);
if (!isFileTransferInProgressAndValid()) {
if (httpRequest) {
releaseHttpRequest();
}
return BELLE_SIP_STOP;
}
// if we've not reach the end of file yet, ask for more data
// in case of file body handler, won't be called
if (currentFileContentToTransfer->getFilePath().empty() && offset < currentFileContentToTransfer->getFileSize()) {
// get data from call back
LinphoneChatMessageCbs *cbs = linphone_chat_message_get_callbacks(msg);
LinphoneChatMessageCbsFileTransferSendCb file_transfer_send_cb =
linphone_chat_message_cbs_get_file_transfer_send(cbs);
LinphoneContent *content = L_GET_C_BACK_PTR((Content *)currentFileContentToTransfer);
if (file_transfer_send_cb) {
LinphoneBuffer *lb = file_transfer_send_cb(msg, content, offset, *size);
if (lb) {
*size = linphone_buffer_get_size(lb);
memcpy(buffer, linphone_buffer_get_content(lb), *size);
linphone_buffer_unref(lb);
} else {
*size = 0;
}
} else {
// Legacy
linphone_core_notify_file_transfer_send(message->getCore()->getCCore(), msg, content, (char *)buffer, size);
}
}
LinphoneImEncryptionEngine *imee = linphone_core_get_im_encryption_engine(message->getCore()->getCCore());
if (imee) {
LinphoneImEncryptionEngineCbs *imee_cbs = linphone_im_encryption_engine_get_callbacks(imee);
LinphoneImEncryptionEngineCbsUploadingFileCb cb_process_uploading_file =
linphone_im_encryption_engine_cbs_get_process_uploading_file(imee_cbs);
if (cb_process_uploading_file) {
size_t max_size = *size;
uint8_t *encrypted_buffer = (uint8_t *)ms_malloc0(max_size);
retval = cb_process_uploading_file(imee, msg, offset, (const uint8_t *)buffer, size, encrypted_buffer);
if (retval == 0) {
if (*size > max_size) {
lError() << "IM encryption engine process upload file callback returned a size bigger than the size of the buffer, so it will be truncated !";
*size = max_size;
}
memcpy(buffer, encrypted_buffer, *size);
}
ms_free(encrypted_buffer);
}
}
return retval <= 0 ? BELLE_SIP_CONTINUE : BELLE_SIP_STOP;
}
static void _chat_message_on_send_end (belle_sip_user_body_handler_t *bh, void *data) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->onSendEnd(bh);
}
void FileTransferChatMessageModifier::onSendEnd (belle_sip_user_body_handler_t *bh) {
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
LinphoneImEncryptionEngine *imee = linphone_core_get_im_encryption_engine(message->getCore()->getCCore());
if (imee) {
LinphoneImEncryptionEngineCbs *imee_cbs = linphone_im_encryption_engine_get_callbacks(imee);
LinphoneImEncryptionEngineCbsUploadingFileCb cb_process_uploading_file = linphone_im_encryption_engine_cbs_get_process_uploading_file(imee_cbs);
if (cb_process_uploading_file) {
cb_process_uploading_file(imee, L_GET_C_BACK_PTR(message), 0, nullptr, nullptr, nullptr);
}
}
}
static void _chat_message_process_response_from_post_file (void *data, const belle_http_response_event_t *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processResponseFromPostFile(event);
}
void FileTransferChatMessageModifier::processResponseFromPostFile (const belle_http_response_event_t *event) {
if (httpRequest && !isFileTransferInProgressAndValid()) {
releaseHttpRequest();
return;
}
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
// check the answer code
if (event->response) {
int code = belle_http_response_get_status_code(event->response);
if (code == 204) { // this is the reply to the first post to the server - an empty msg
// start uploading the file
belle_sip_multipart_body_handler_t *bh;
string first_part_header;
belle_sip_body_handler_t *first_part_bh;
bool is_file_encryption_enabled = false;
LinphoneImEncryptionEngine *imee = linphone_core_get_im_encryption_engine(message->getCore()->getCCore());
if (imee && message->getChatRoom()) {
LinphoneImEncryptionEngineCbs *imee_cbs = linphone_im_encryption_engine_get_callbacks(imee);
LinphoneImEncryptionEngineCbsIsEncryptionEnabledForFileTransferCb is_encryption_enabled_for_file_transfer_cb =
linphone_im_encryption_engine_cbs_get_is_encryption_enabled_for_file_transfer(imee_cbs);
if (is_encryption_enabled_for_file_transfer_cb) {
is_file_encryption_enabled = is_encryption_enabled_for_file_transfer_cb(imee, L_GET_C_BACK_PTR(message->getChatRoom()));
}
}
FileTransferContent *fileTransferContent = new FileTransferContent();
fileTransferContent->setContentType(ContentType::FileTransfer);
fileTransferContent->setFileSize(currentFileContentToTransfer->getFileSize()); // Copy file size information
message->getPrivate()->addContent(fileTransferContent);
// shall we encrypt the file
if (is_file_encryption_enabled && message->getChatRoom()) {
// temporary storage for the Content-disposition header value : use a generic filename to not leak it
// Actual filename stored in msg->file_transfer_information->name will be set in encrypted msg
// sended to the
first_part_header = "form-data; name=\"File\"; filename=\"filename.txt\"";
LinphoneImEncryptionEngineCbs *imee_cbs = linphone_im_encryption_engine_get_callbacks(imee);
LinphoneImEncryptionEngineCbsGenerateFileTransferKeyCb generate_file_transfer_key_cb =
linphone_im_encryption_engine_cbs_get_generate_file_transfer_key(imee_cbs);
if (generate_file_transfer_key_cb) {
generate_file_transfer_key_cb(imee, L_GET_C_BACK_PTR(message->getChatRoom()), L_GET_C_BACK_PTR(message));
}
} else {
// temporary storage for the Content-disposition header value
first_part_header = "form-data; name=\"File\"; filename=\"" + currentFileContentToTransfer->getFileName() + "\"";
}
// create a user body handler to take care of the file and add the content disposition and content-type headers
first_part_bh = (belle_sip_body_handler_t *)belle_sip_user_body_handler_new(currentFileContentToTransfer->getFileSize(),
_chat_message_file_transfer_on_progress, nullptr, nullptr,
_chat_message_on_send_body, _chat_message_on_send_end, this);
if (!currentFileContentToTransfer->getFilePath().empty()) {
belle_sip_user_body_handler_t *body_handler = (belle_sip_user_body_handler_t *)first_part_bh;
// No need to add again the callback for progression, otherwise it will be called twice
first_part_bh = (belle_sip_body_handler_t *)belle_sip_file_body_handler_new(currentFileContentToTransfer->getFilePath().c_str(), nullptr, this);
belle_sip_file_body_handler_set_user_body_handler((belle_sip_file_body_handler_t *)first_part_bh, body_handler);
// Ensure the file size has been set to the correct value
fileTransferContent->setFileSize(belle_sip_file_body_handler_get_file_size((belle_sip_file_body_handler_t *)first_part_bh));
} else if (!currentFileContentToTransfer->isEmpty()) {
first_part_bh = (belle_sip_body_handler_t *)belle_sip_memory_body_handler_new_from_buffer(
ms_strdup(currentFileContentToTransfer->getBodyAsString().c_str()),
currentFileContentToTransfer->getSize(), _chat_message_file_transfer_on_progress, this);
}
belle_sip_body_handler_add_header(first_part_bh,
belle_sip_header_create("Content-disposition", first_part_header.c_str()));
belle_sip_body_handler_add_header(first_part_bh,
(belle_sip_header_t *)belle_sip_header_content_type_create(
currentFileContentToTransfer->getContentType().getType().c_str(),
currentFileContentToTransfer->getContentType().getSubType().c_str()));
// insert it in a multipart body handler which will manage the boundaries of multipart msg
bh = belle_sip_multipart_body_handler_new(_chat_message_file_transfer_on_progress, this, first_part_bh, nullptr);
releaseHttpRequest();
fileUploadBeginBackgroundTask();
uploadFile();
belle_sip_message_set_body_handler(BELLE_SIP_MESSAGE(httpRequest), BELLE_SIP_BODY_HANDLER(bh));
} else if (code == 200) { // file has been uploaded correctly, get server reply and send it
FileTransferContent *fileTransferContent = nullptr;
for (Content *c : message->getPrivate()->getContents()) {
if (c->isFileTransfer()) {
FileTransferContent *tmpContent = static_cast<FileTransferContent *>(c);
if (!tmpContent->getFileContent() && tmpContent->getSize() == 0) {
// If FileTransferContent doesn't have a FileContent yet and is empty
// It's the one we seek, otherwise it may be a previous uploaded FileTransferContent
fileTransferContent = tmpContent;
break;
}
}
}
const char *body = belle_sip_message_get_body((belle_sip_message_t *)event->response);
if (body && strlen(body) > 0) {
// if we have an encryption key for the file, we must insert it into the msg and restore the correct filename
const unsigned char *contentKey = reinterpret_cast<const unsigned char *>(fileTransferContent->getFileKey().data());
size_t contentKeySize = fileTransferContent->getFileKeySize();
if (contentKeySize > 0) {
// parse the msg body
xmlDocPtr xmlMessageBody = xmlParseDoc((const xmlChar *)body);
xmlNodePtr cur = xmlDocGetRootElement(xmlMessageBody);
if (cur != nullptr) {
cur = cur->xmlChildrenNode;
while (cur != nullptr) {
// we found a file info node, check it has a type="file" attribute
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-info")) {
xmlChar *typeAttribute = xmlGetProp(cur, (const xmlChar *)"type");
// this is the node we are looking for : add a file-key children node
if (!xmlStrcmp(typeAttribute, (const xmlChar *)"file")) {
// need to parse the children node to update the file-name one
xmlNodePtr fileInfoNodeChildren = cur->xmlChildrenNode;
// convert key to base64
size_t b64Size;
bctbx_base64_encode(nullptr, &b64Size, contentKey, contentKeySize);
unsigned char *keyb64 = (unsigned char *)ms_malloc0(b64Size + 1);
int xmlStringLength;
bctbx_base64_encode(keyb64, &b64Size, contentKey, contentKeySize);
keyb64[b64Size] = '\0'; // libxml need a null terminated string
// add the node containing the key to the file-info node
xmlNewTextChild(cur, nullptr, (const xmlChar *)"file-key", (const xmlChar *)keyb64);
xmlFree(typeAttribute);
ms_free(keyb64);
// look for the file-name node and update its content
while (fileInfoNodeChildren != nullptr) {
// we found a the file-name node, update its content with the real filename
if (!xmlStrcmp(fileInfoNodeChildren->name, (const xmlChar *)"file-name")) {
// update node content
xmlNodeSetContent(fileInfoNodeChildren, (const xmlChar *)(currentFileContentToTransfer->getFileName().c_str()));
break;
}
fileInfoNodeChildren = fileInfoNodeChildren->next;
}
// dump the xml into msg->message
char *buffer;
xmlDocDumpFormatMemoryEnc(xmlMessageBody, (xmlChar **)&buffer, &xmlStringLength, "UTF-8", 0);
fileTransferContent->setBody(buffer);
break;
}
xmlFree(typeAttribute);
}
cur = cur->next;
}
}
xmlFreeDoc(xmlMessageBody);
} else { // no encryption key, transfer in plain, just copy the msg sent by server
fileTransferContent->setBody(body);
}
FileContent *fileContent = currentFileContentToTransfer;
fileTransferContent->setFileContent(fileContent);
message->getPrivate()->removeContent(fileContent);
message->getPrivate()->setState(ChatMessage::State::FileTransferDone);
releaseHttpRequest();
message->getPrivate()->send();
fileUploadEndBackgroundTask();
} else {
lWarning() << "Received empty response from server, file transfer failed";
FileTransferContent *fileTransferContent = nullptr;
for (Content *c : message->getPrivate()->getContents()) {
if (c->isFileTransfer()) {
fileTransferContent = static_cast<FileTransferContent *>(c);
message->getPrivate()->removeContent(fileTransferContent);
delete fileTransferContent;
break;
}
}
message->getPrivate()->setState(ChatMessage::State::NotDelivered);
releaseHttpRequest();
fileUploadEndBackgroundTask();
}
} else if (code == 400) {
lWarning() << "Received HTTP code response " << code << " for file transfer, probably meaning file is too large";
FileTransferContent *fileTransferContent = nullptr;
for (Content *c : message->getPrivate()->getContents()) {
if (c->isFileTransfer()) {
fileTransferContent = static_cast<FileTransferContent *>(c);
message->getPrivate()->removeContent(fileTransferContent);
delete fileTransferContent;
break;
}
}
message->getPrivate()->setState(ChatMessage::State::FileTransferError);
releaseHttpRequest();
fileUploadEndBackgroundTask();
} else {
lWarning() << "Unhandled HTTP code response " << code << " for file transfer";
FileTransferContent *fileTransferContent = nullptr;
for (Content *c : message->getPrivate()->getContents()) {
if (c->isFileTransfer()) {
fileTransferContent = static_cast<FileTransferContent *>(c);
message->getPrivate()->removeContent(fileTransferContent);
delete fileTransferContent;
break;
}
}
message->getPrivate()->setState(ChatMessage::State::NotDelivered);
releaseHttpRequest();
fileUploadEndBackgroundTask();
}
}
}
static void _chat_message_process_io_error_upload (void *data, const belle_sip_io_error_event_t *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processIoErrorUpload(event);
}
void FileTransferChatMessageModifier::processIoErrorUpload (const belle_sip_io_error_event_t *event) {
lError() << "I/O Error during file upload of msg [" << this << "]";
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
message->getPrivate()->setState(ChatMessage::State::NotDelivered);
releaseHttpRequest();
}
static void _chat_message_process_auth_requested_upload (void *data, belle_sip_auth_event *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processAuthRequestedUpload(event);
}
void FileTransferChatMessageModifier::processAuthRequestedUpload (const belle_sip_auth_event *event) {
lError() << "Error during file upload: auth requested for msg [" << this << "]";
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
message->getPrivate()->setState(ChatMessage::State::NotDelivered);
releaseHttpRequest();
}
int FileTransferChatMessageModifier::uploadFile () {
if (httpRequest) {
lError() << "Unable to upload file: there is already an upload in progress.";
return -1;
}
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return -1;
// THIS IS ONLY FOR BACKWARD C API COMPAT
if (currentFileContentToTransfer->getFilePath().empty() && !message->getPrivate()->getFileTransferFilepath().empty()) {
currentFileContentToTransfer->setFilePath(message->getPrivate()->getFileTransferFilepath());
}
belle_http_request_listener_callbacks_t cbs = { 0 };
cbs.process_response = _chat_message_process_response_from_post_file;
cbs.process_io_error = _chat_message_process_io_error_upload;
cbs.process_auth_requested = _chat_message_process_auth_requested_upload;
const char *url = linphone_core_get_file_transfer_server(message->getCore()->getCCore());
return startHttpTransfer(url ? url : "", "POST", &cbs);
}
int FileTransferChatMessageModifier::startHttpTransfer (const string &url, const string &action, belle_http_request_listener_callbacks_t *cbs) {
belle_generic_uri_t *uri = nullptr;
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return -1;
if (url.empty()) {
lWarning() << "Cannot process file transfer msg [" << this << "]: no file remote URI configured.";
goto error;
}
uri = belle_generic_uri_parse(url.c_str());
if (!uri || !belle_generic_uri_get_host(uri)) {
lWarning() << "Cannot process file transfer msg [" << this << "]: incorrect file remote URI configured '" <<
url << "'.";
goto error;
}
httpRequest = belle_http_request_create(
action.c_str(),
uri,
belle_sip_header_create("User-Agent", linphone_core_get_user_agent(message->getCore()->getCCore())),
nullptr
);
if (!httpRequest) {
lWarning() << "Could not create http request for uri " << url;
goto error;
}
// keep a reference to the http request to be able to cancel it during upload
belle_sip_object_ref(httpRequest);
// give msg to listener to be able to start the actual file upload when server answer a 204 No content
httpListener = belle_http_request_listener_create_from_callbacks(cbs, this);
belle_http_provider_send_request(provider, httpRequest, httpListener);
return 0;
error:
if (uri) {
belle_sip_object_unref(uri);
}
return -1;
}
void FileTransferChatMessageModifier::fileUploadBeginBackgroundTask () {
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
bgTask.start(message->getCore());
}
void FileTransferChatMessageModifier::fileUploadEndBackgroundTask () {
bgTask.stop();
}
// ----------------------------------------------------------
static void fillFileTransferContentInformationsFromVndGsmaRcsFtHttpXml (FileTransferContent *fileTransferContent) {
xmlChar *fileUrl = nullptr;
xmlDocPtr xmlMessageBody;
xmlNodePtr cur;
/* parse the msg body to get all informations from it */
xmlMessageBody = xmlParseDoc((const xmlChar *)fileTransferContent->getBodyAsString().c_str());
cur = xmlDocGetRootElement(xmlMessageBody);
if (cur) {
cur = cur->xmlChildrenNode;
while (cur) {
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-info")) {
/* we found a file info node, check if it has a type="file" attribute */
xmlChar *typeAttribute = xmlGetProp(cur, (const xmlChar *)"type");
if (!xmlStrcmp(typeAttribute, (const xmlChar *)"file")) { /* this is the node we are looking for */
cur = cur->xmlChildrenNode; /* now loop on the content of the file-info node */
while (cur) {
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-size")) {
xmlChar *fileSizeString = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
size_t size = (size_t)strtol((const char *)fileSizeString, nullptr, 10);
fileTransferContent->setFileSize(size);
xmlFree(fileSizeString);
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-name")) {
xmlChar *filename = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
fileTransferContent->setFileName((char *)filename);
xmlFree(filename);
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"data")) {
fileUrl = xmlGetProp(cur, (const xmlChar *)"url");
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-key")) {
// there is a key in the msg: file has been encrypted
// convert the key from base 64
xmlChar *keyb64 = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
size_t keyLength;
bctbx_base64_decode(NULL, &keyLength, (unsigned char *)keyb64, strlen((const char *)keyb64));
uint8_t *keyBuffer = (uint8_t *)malloc(keyLength);
// decode the key into local key buffer
bctbx_base64_decode(keyBuffer, &keyLength, (unsigned char *)keyb64, strlen((const char *)keyb64));
fileTransferContent->setFileKey((const char *)keyBuffer, keyLength);
// duplicate key value into the linphone content private structure
xmlFree(keyb64);
free(keyBuffer);
}
cur = cur->next;
}
xmlFree(typeAttribute);
break;
}
xmlFree(typeAttribute);
}
cur = cur->next;
}
}
xmlFreeDoc(xmlMessageBody);
fileTransferContent->setFileUrl(fileUrl ? (const char *)fileUrl : "");
xmlFree(fileUrl);
}
ChatMessageModifier::Result FileTransferChatMessageModifier::decode (const shared_ptr<ChatMessage> &message, int &errorCode) {
chatMessage = message;
Content internalContent = message->getInternalContent();
if (internalContent.getContentType() == ContentType::FileTransfer) {
FileTransferContent *fileTransferContent = new FileTransferContent();
fileTransferContent->setContentType(internalContent.getContentType());
fileTransferContent->setBody(internalContent.getBody());
fillFileTransferContentInformationsFromVndGsmaRcsFtHttpXml(fileTransferContent);
message->addContent(fileTransferContent);
return ChatMessageModifier::Result::Done;
}
for (Content *content : message->getContents()) {
if (content->isFileTransfer()) {
FileTransferContent *fileTransferContent = static_cast<FileTransferContent *>(content);
fillFileTransferContentInformationsFromVndGsmaRcsFtHttpXml(fileTransferContent);
}
}
return ChatMessageModifier::Result::Done;
}
// ----------------------------------------------------------
static void createFileTransferInformationsFromVndGsmaRcsFtHttpXml (FileTransferContent *fileTransferContent) {
xmlChar *fileUrl = nullptr;
xmlDocPtr xmlMessageBody;
xmlNodePtr cur;
/* parse the msg body to get all informations from it */
xmlMessageBody = xmlParseDoc((const xmlChar *)fileTransferContent->getBodyAsString().c_str());
FileContent *fileContent = new FileContent();
cur = xmlDocGetRootElement(xmlMessageBody);
if (cur) {
cur = cur->xmlChildrenNode;
while (cur) {
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-info")) {
/* we found a file info node, check if it has a type="file" attribute */
xmlChar *typeAttribute = xmlGetProp(cur, (const xmlChar *)"type");
if (!xmlStrcmp(typeAttribute, (const xmlChar *)"file")) { /* this is the node we are looking for */
cur = cur->xmlChildrenNode; /* now loop on the content of the file-info node */
while (cur) {
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-size")) {
xmlChar *fileSizeString = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
size_t size = (size_t)strtol((const char *)fileSizeString, nullptr, 10);
fileContent->setFileSize(size);
xmlFree(fileSizeString);
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-name")) {
xmlChar *filename = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
fileContent->setFileName((char *)filename);
xmlFree(filename);
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"content-type")) {
xmlChar *content_type = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
int contentTypeIndex = 0;
char *type;
char *subtype;
while (content_type[contentTypeIndex] != '/' && content_type[contentTypeIndex] != '\0') {
contentTypeIndex++;
}
type = ms_strndup((char *)content_type, contentTypeIndex);
subtype = ms_strdup(((char *)content_type + contentTypeIndex + 1));
ContentType contentType(type, subtype);
fileContent->setContentType(contentType);
ms_free(subtype);
ms_free(type);
ms_free(content_type);
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"data")) {
fileUrl = xmlGetProp(cur, (const xmlChar *)"url");
}
if (!xmlStrcmp(cur->name, (const xmlChar *)"file-key")) {
// there is a key in the msg: file has been encrypted
// convert the key from base 64
xmlChar *keyb64 = xmlNodeListGetString(xmlMessageBody, cur->xmlChildrenNode, 1);
size_t keyLength;
bctbx_base64_decode(NULL, &keyLength, (unsigned char *)keyb64, strlen((const char *)keyb64));
uint8_t *keyBuffer = (uint8_t *)malloc(keyLength);
// decode the key into local key buffer
bctbx_base64_decode(keyBuffer, &keyLength, (unsigned char *)keyb64, strlen((const char *)keyb64));
fileTransferContent->setFileKey((const char *)keyBuffer, keyLength);
// duplicate key value into the linphone content private structure
xmlFree(keyb64);
free(keyBuffer);
}
cur = cur->next;
}
xmlFree(typeAttribute);
break;
}
xmlFree(typeAttribute);
}
cur = cur->next;
}
}
xmlFreeDoc(xmlMessageBody);
fileContent->setFilePath(fileTransferContent->getFilePath()); // Copy file path from file transfer content to file content for file body handler
// Link the FileContent to the FileTransferContent
fileTransferContent->setFileContent(fileContent);
xmlFree(fileUrl);
}
static void _chat_message_on_recv_body (belle_sip_user_body_handler_t *bh, belle_sip_message_t *m, void *data, size_t offset, uint8_t *buffer, size_t size) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->onRecvBody(bh, m, offset, buffer, size);
}
void FileTransferChatMessageModifier::onRecvBody (belle_sip_user_body_handler_t *bh, belle_sip_message_t *m, size_t offset, uint8_t *buffer, size_t size) {
if (!httpRequest || belle_http_request_is_cancelled(httpRequest)) {
lWarning() << "Cancelled request for msg [" << this << "], ignoring " << __FUNCTION__;
return;
}
// first call may be with a zero size, ignore it
if (size == 0) {
return;
}
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
int retval = -1;
LinphoneImEncryptionEngine *imee = linphone_core_get_im_encryption_engine(message->getCore()->getCCore());
if (imee) {
LinphoneImEncryptionEngineCbs *imee_cbs = linphone_im_encryption_engine_get_callbacks(imee);
LinphoneImEncryptionEngineCbsDownloadingFileCb cb_process_downloading_file = linphone_im_encryption_engine_cbs_get_process_downloading_file(imee_cbs);
if (cb_process_downloading_file) {
uint8_t *decrypted_buffer = (uint8_t *)ms_malloc0(size);
retval = cb_process_downloading_file(imee, L_GET_C_BACK_PTR(message), offset, (const uint8_t *)buffer, size, decrypted_buffer);
if (retval == 0) {
memcpy(buffer, decrypted_buffer, size);
}
ms_free(decrypted_buffer);
}
}
if (retval <= 0) {
if (currentFileContentToTransfer->getFilePath().empty()) {
LinphoneChatMessage *msg = L_GET_C_BACK_PTR(message);
LinphoneChatMessageCbs *cbs = linphone_chat_message_get_callbacks(msg);
LinphoneContent *content = L_GET_C_BACK_PTR((Content *)currentFileContentToTransfer);
if (linphone_chat_message_cbs_get_file_transfer_recv(cbs)) {
LinphoneBuffer *lb = linphone_buffer_new_from_data(buffer, size);
linphone_chat_message_cbs_get_file_transfer_recv(cbs)(msg, content, lb);
linphone_buffer_unref(lb);
} else {
// Legacy: call back given by application level
linphone_core_notify_file_transfer_recv(message->getCore()->getCCore(), msg, content, (const char *)buffer, size);
}
}
} else {
lWarning() << "File transfer decrypt failed with code " << (int)retval;
message->getPrivate()->setState(ChatMessage::State::FileTransferError);
}
}
static void _chat_message_on_recv_end (belle_sip_user_body_handler_t *bh, void *data) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->onRecvEnd(bh);
}
void FileTransferChatMessageModifier::onRecvEnd (belle_sip_user_body_handler_t *bh) {
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
int retval = -1;
LinphoneImEncryptionEngine *imee = linphone_core_get_im_encryption_engine(message->getCore()->getCCore());
if (imee) {
LinphoneImEncryptionEngineCbs *imee_cbs = linphone_im_encryption_engine_get_callbacks(imee);
LinphoneImEncryptionEngineCbsDownloadingFileCb cb_process_downloading_file = linphone_im_encryption_engine_cbs_get_process_downloading_file(imee_cbs);
if (cb_process_downloading_file) {
retval = cb_process_downloading_file(imee, L_GET_C_BACK_PTR(message), 0, nullptr, 0, nullptr);
}
}
if (retval <= 0) {
if (currentFileContentToTransfer->getFilePath().empty()) {
LinphoneChatMessage *msg = L_GET_C_BACK_PTR(message);
LinphoneChatMessageCbs *cbs = linphone_chat_message_get_callbacks(msg);
LinphoneContent *content = L_GET_C_BACK_PTR((Content *)currentFileContentToTransfer);
if (linphone_chat_message_cbs_get_file_transfer_recv(cbs)) {
LinphoneBuffer *lb = linphone_buffer_new();
linphone_chat_message_cbs_get_file_transfer_recv(cbs)(msg, content, lb);
linphone_buffer_unref(lb);
} else {
// Legacy: call back given by application level
linphone_core_notify_file_transfer_recv(message->getCore()->getCCore(), msg, content, nullptr, 0);
}
}
}
if (retval <= 0 && message->getState() != ChatMessage::State::FileTransferError) {
// Remove the FileTransferContent from the message and store the FileContent
FileContent *fileContent = currentFileContentToTransfer;
message->getPrivate()->addContent(fileContent);
for (Content *content : message->getContents()) {
if (content->isFileTransfer()) {
FileTransferContent *fileTransferContent = static_cast<FileTransferContent *>(content);
if (fileTransferContent->getFileContent() == fileContent) {
message->getPrivate()->removeContent(content);
delete fileTransferContent;
break;
}
}
}
message->getPrivate()->setState(ChatMessage::State::FileTransferDone);
}
}
static void _chat_process_response_headers_from_get_file (void *data, const belle_http_response_event_t *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processResponseHeadersFromGetFile(event);
}
static FileContent* createFileTransferInformationFromHeaders (const belle_sip_message_t *m) {
FileContent *fileContent = new FileContent();
belle_sip_header_content_length_t *content_length_hdr = BELLE_SIP_HEADER_CONTENT_LENGTH(belle_sip_message_get_header(m, "Content-Length"));
belle_sip_header_content_type_t *content_type_hdr = BELLE_SIP_HEADER_CONTENT_TYPE(belle_sip_message_get_header(m, "Content-Type"));
if (content_type_hdr) {
const char *type = belle_sip_header_content_type_get_type(content_type_hdr);
const char *subtype = belle_sip_header_content_type_get_subtype(content_type_hdr);
lInfo() << "Extracted content type " << type << " / " << subtype << " from header";
ContentType contentType(type, subtype);
fileContent->setContentType(contentType);
}
if (content_length_hdr) {
fileContent->setFileSize(belle_sip_header_content_length_get_content_length(content_length_hdr));
lInfo() << "Extracted content length " << fileContent->getFileSize() << " from header";
}
return fileContent;
}
void FileTransferChatMessageModifier::processResponseHeadersFromGetFile (const belle_http_response_event_t *event) {
if (event->response) {
// we are receiving a response, set a specific body handler to acquire the response.
// if not done, belle-sip will create a memory body handler, the default
belle_sip_message_t *response = BELLE_SIP_MESSAGE(event->response);
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
if (currentFileContentToTransfer) {
belle_sip_header_content_length_t *content_length_hdr = BELLE_SIP_HEADER_CONTENT_LENGTH(belle_sip_message_get_header(response, "Content-Length"));
currentFileContentToTransfer->setFileSize(belle_sip_header_content_length_get_content_length(content_length_hdr));
lInfo() << "Extracted content length " << currentFileContentToTransfer->getFileSize() << " from header";
} else {
lWarning() << "No file transfer information for msg [" << this << "]: creating...";
FileContent *content = createFileTransferInformationFromHeaders(response);
message->addContent(content);
}
size_t body_size = 0;
if (currentFileContentToTransfer)
body_size = currentFileContentToTransfer->getFileSize();
belle_sip_body_handler_t *body_handler = (belle_sip_body_handler_t *)belle_sip_user_body_handler_new(
body_size, _chat_message_file_transfer_on_progress,
nullptr, _chat_message_on_recv_body,
nullptr, _chat_message_on_recv_end, this
);
if (!currentFileContentToTransfer->getFilePath().empty()) {
belle_sip_user_body_handler_t *bh = (belle_sip_user_body_handler_t *)body_handler;
body_handler = (belle_sip_body_handler_t *)belle_sip_file_body_handler_new(currentFileContentToTransfer->getFilePath().c_str(), _chat_message_file_transfer_on_progress, this);
if (belle_sip_body_handler_get_size((belle_sip_body_handler_t *)body_handler) == 0) {
// If the size of the body has not been initialized from the file stat, use the one from the
// file_transfer_information.
belle_sip_body_handler_set_size((belle_sip_body_handler_t *)body_handler, body_size);
}
belle_sip_file_body_handler_set_user_body_handler((belle_sip_file_body_handler_t *)body_handler, bh);
}
belle_sip_message_set_body_handler((belle_sip_message_t *)event->response, body_handler);
}
}
static void _chat_message_process_auth_requested_download (void *data, belle_sip_auth_event *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processAuthRequestedDownload(event);
}
void FileTransferChatMessageModifier::processAuthRequestedDownload (const belle_sip_auth_event *event) {
lError() << "Error during file download : auth requested for msg [" << this << "]";
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
message->getPrivate()->setState(ChatMessage::State::FileTransferError);
releaseHttpRequest();
}
static void _chat_message_process_io_error_download (void *data, const belle_sip_io_error_event_t *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processIoErrorDownload(event);
}
void FileTransferChatMessageModifier::processIoErrorDownload (const belle_sip_io_error_event_t *event) {
lError() << "I/O Error during file download msg [" << this << "]";
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
message->getPrivate()->setState(ChatMessage::State::FileTransferError);
releaseHttpRequest();
}
static void _chat_message_process_response_from_get_file (void *data, const belle_http_response_event_t *event) {
FileTransferChatMessageModifier *d = (FileTransferChatMessageModifier *)data;
d->processResponseFromGetFile(event);
}
void FileTransferChatMessageModifier::processResponseFromGetFile (const belle_http_response_event_t *event) {
// check the answer code
if (event->response) {
shared_ptr<ChatMessage> message = chatMessage.lock();
if (!message)
return;
int code = belle_http_response_get_status_code(event->response);
if (code >= 400 && code < 500) {
lWarning() << "File transfer failed with code " << code;
message->getPrivate()->setState(ChatMessage::State::FileTransferError);
} else if (code != 200) {
lWarning() << "Unhandled HTTP code response " << code << " for file transfer";
}
releaseHttpRequest();
}
}
bool FileTransferChatMessageModifier::downloadFile (
const shared_ptr<ChatMessage> &message,
FileTransferContent *fileTransferContent
) {
chatMessage = message;
if (httpRequest) {
lError() << "There is already a download in progress.";
return false;
}
if (fileTransferContent->getContentType() != ContentType::FileTransfer) {
lError() << "Content type is not a FileTransfer.";
return false;
}
createFileTransferInformationsFromVndGsmaRcsFtHttpXml(fileTransferContent);
FileContent *fileContent = fileTransferContent->getFileContent();
currentFileContentToTransfer = fileContent;
if (!currentFileContentToTransfer)
return false;
// THIS IS ONLY FOR BACKWARD C API COMPAT
if (currentFileContentToTransfer->getFilePath().empty() && !message->getPrivate()->getFileTransferFilepath().empty()) {
currentFileContentToTransfer->setFilePath(message->getPrivate()->getFileTransferFilepath());
}
belle_http_request_listener_callbacks_t cbs = { 0 };
cbs.process_response_headers = _chat_process_response_headers_from_get_file;
cbs.process_response = _chat_message_process_response_from_get_file;
cbs.process_io_error = _chat_message_process_io_error_download;
cbs.process_auth_requested = _chat_message_process_auth_requested_download;
int err = startHttpTransfer(fileTransferContent->getFileUrl(), "GET", &cbs); // File URL has been set by createFileTransferInformationsFromVndGsmaRcsFtHttpXml
if (err == -1)
return false;
// start the download, status is In Progress
message->getPrivate()->setState(ChatMessage::State::InProgress);
return true;
}
// ----------------------------------------------------------
void FileTransferChatMessageModifier::cancelFileTransfer () {
if (!httpRequest) {
lInfo() << "No existing file transfer - nothing to cancel";
return;
}
if (!belle_http_request_is_cancelled(httpRequest)) {
shared_ptr<ChatMessage> message = chatMessage.lock();
if (message) {
lInfo() << "Canceling file transfer " << (
currentFileContentToTransfer->getFilePath().empty()
? L_C_TO_STRING(linphone_core_get_file_transfer_server(message->getCore()->getCCore()))
: currentFileContentToTransfer->getFilePath().c_str()
);
} else {
lInfo() << "Warning: http request still running for ORPHAN msg: this is a memory leak";
}
belle_http_provider_cancel_request(provider, httpRequest);
}
releaseHttpRequest();
}
bool FileTransferChatMessageModifier::isFileTransferInProgressAndValid () {
return httpRequest && !belle_http_request_is_cancelled(httpRequest);
}
void FileTransferChatMessageModifier::releaseHttpRequest () {
if (httpRequest) {
belle_sip_object_unref(httpRequest);
httpRequest = nullptr;
if (httpListener) {
belle_sip_object_unref(httpListener);
httpListener = nullptr;
}
}
}
string FileTransferChatMessageModifier::createFakeFileTransferFromUrl (const string &url) {
string fileName = url.substr(url.find_last_of("/") + 1);
stringstream fakeXml;
fakeXml << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n";
fakeXml << "<file xmlns=\"urn:gsma:params:xml:ns:rcs:rcs:fthttp\">\r\n";
fakeXml << "<file-info type=\"file\">\r\n";
fakeXml << "<file-name>" << fileName << "</file-name>\r\n";
fakeXml << "<content-type>application/binary</content-type>\r\n";
fakeXml << "<data url = \"" << url << "\"/>\r\n";
fakeXml << "</file-info>\r\n";
fakeXml << "</file>";
return fakeXml.str();
}
LINPHONE_END_NAMESPACE
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