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WFileUpload.C
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WFileUpload.C
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/*
* Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
*
* See the LICENSE file for terms of use.
*/
#include <boost/lexical_cast.hpp>
#include "Wt/WFileUpload"
#include "Wt/WApplication"
#include "Wt/WEnvironment"
#include "Wt/WLogger"
#include "Wt/WProgressBar"
#include "Wt/WResource"
#include "Wt/Http/Request"
#include "Wt/Http/Response"
#include "DomElement.h"
#include "WebSession.h"
#include "WebRequest.h"
#include "WebUtils.h"
#ifndef _MSC_VER
#include <unistd.h>
#endif
namespace Wt {
LOGGER("WFileUpload");
class WFileUploadResource : public WResource {
public:
WFileUploadResource(WFileUpload *fileUpload)
: WResource(fileUpload),
fileUpload_(fileUpload)
{ }
protected:
virtual void handleRequest(const Http::Request& request,
Http::Response& response) {
bool triggerUpdate = false;
std::vector<Http::UploadedFile> files;
#ifdef WT_TARGET_JAVA
static Http::UploadedFile* uploaded;
#endif
Utils::find(request.uploadedFiles(), "data", files);
if (!request.tooLarge())
if (!files.empty() || request.getParameter("data"))
triggerUpdate = true;
response.setMimeType("text/html; charset=utf-8");
response.addHeader("Expires", "Sun, 14 Jun 2020 00:00:00 GMT");
response.addHeader("Cache-Control", "max-age=315360000");
#ifndef WT_TARGET_JAVA
std::ostream& o = response.out();
#else
std::ostream o(response.out());
#endif // WT_TARGET_JAVA
o << "<!DOCTYPE html>"
"<html>\n"
"<head><script type=\"text/javascript\">\n"
"function load() { ";
if (triggerUpdate || request.tooLarge()) {
o << "if (window.parent."
<< WApplication::instance()->javaScriptClass() << ") ";
if (triggerUpdate) {
LOG_DEBUG("Resource handleRequest(): signaling uploaded");
o << "window.parent."
<< WApplication::instance()->javaScriptClass()
<< "._p_.update(null, '"
<< fileUpload_->uploaded().encodeCmd() << "', null, true);";
} else if (request.tooLarge()) {
LOG_DEBUG("Resource handleRequest(): signaling file-too-large");
o << "window.parent."
<< WApplication::instance()->javaScriptClass()
<< "._p_.update(null, '"
<< fileUpload_->fileTooLargeImpl().encodeCmd() << "', null, true);";
}
} else {
LOG_DEBUG("Resource handleRequest(): no signal");
}
o << "}\n"
"</script></head>"
"<body onload=\"load();\"></body></html>";
if (request.tooLarge())
fileUpload_->tooLargeSize_ = request.tooLarge();
else
if (!files.empty())
fileUpload_->setFiles(files);
}
private:
WFileUpload *fileUpload_;
};
const char *WFileUpload::CHANGE_SIGNAL = "M_change";
const char *WFileUpload::UPLOADED_SIGNAL = "M_uploaded";
const char *WFileUpload::FILETOOLARGE_SIGNAL = "M_filetoolarge";
/*
* Supporting the file API:
* - still create the resource
* - do not create the iframe
* - JavaScript method to do the upload
*/
WFileUpload::WFileUpload(WContainerWidget *parent)
: WWebWidget(parent),
textSize_(20),
fileTooLarge_(this),
dataReceived_(this),
progressBar_(0),
tooLargeSize_(0)
{
setInline(true);
fileTooLargeImpl().connect(this, &WFileUpload::handleFileTooLargeImpl);
create();
}
void WFileUpload::create()
{
// NOTE: this is broken on konqueror: you cannot target a form anymore
bool methodIframe = WApplication::instance()->environment().ajax();
if (methodIframe) {
fileUploadTarget_ = new WFileUploadResource(this);
fileUploadTarget_->setUploadProgress(true);
fileUploadTarget_->dataReceived().connect(this, &WFileUpload::onData);
setJavaScriptMember(WT_RESIZE_JS,
"function(self,w,h) {"
"$(self).find('input').width(w);"
"}");
} else
fileUploadTarget_ = 0;
setFormObject(!fileUploadTarget_);
uploaded().connect(this, &WFileUpload::onUploaded);
fileTooLarge().connect(this, &WFileUpload::onUploaded);
}
WFileUpload::~WFileUpload()
{
if (flags_.test(BIT_UPLOADING))
WApplication::instance()->enableUpdates(false);
}
void WFileUpload::onUploaded()
{
if (flags_.test(BIT_UPLOADING)) {
WApplication::instance()->enableUpdates(false);
flags_.reset(BIT_UPLOADING);
}
}
void WFileUpload::onData(::uint64_t current, ::uint64_t total)
{
dataReceived_.emit(current, total);
WebSession::Handler *h = WebSession::Handler::instance();
::int64_t dataExceeded = h->request()->postDataExceeded();
h->setRequest(0, 0); // so that triggerUpdate() will work
if (dataExceeded) {
if (flags_.test(BIT_UPLOADING)) {
flags_.reset(BIT_UPLOADING);
tooLargeSize_ = dataExceeded;
handleFileTooLargeImpl();
WApplication *app = WApplication::instance();
app->triggerUpdate();
app->enableUpdates(false);
}
return;
}
if (progressBar_ && flags_.test(BIT_UPLOADING)) {
progressBar_->setRange(0, (double)total);
progressBar_->setValue((double)current);
WApplication *app = WApplication::instance();
app->triggerUpdate();
}
}
void WFileUpload::enableAjax()
{
create();
flags_.set(BIT_ENABLE_AJAX);
repaint();
WWebWidget::enableAjax();
}
void WFileUpload::setProgressBar(WProgressBar *bar)
{
delete progressBar_;
progressBar_ = bar;
if (progressBar_) {
if (!progressBar_->parent()) {
progressBar_->setParentWidget(this);
progressBar_->hide();
}
}
}
EventSignal<>& WFileUpload::uploaded()
{
return *voidEventSignal(UPLOADED_SIGNAL, true);
}
EventSignal<>& WFileUpload::changed()
{
return *voidEventSignal(CHANGE_SIGNAL, true);
}
EventSignal<>& WFileUpload::fileTooLargeImpl()
{
return *voidEventSignal(FILETOOLARGE_SIGNAL, true);
}
void WFileUpload::handleFileTooLargeImpl()
{
fileTooLarge().emit(tooLargeSize_);
}
void WFileUpload::setFileTextSize(int chars)
{
textSize_ = chars;
}
void WFileUpload::setMultiple(bool multiple)
{
flags_.set(BIT_MULTIPLE, multiple);
}
std::string WFileUpload::spoolFileName() const
{
if (!empty())
return uploadedFiles_[0].spoolFileName();
else
return std::string();
}
WT_USTRING WFileUpload::clientFileName() const
{
if (!empty())
return WT_USTRING::fromUTF8(uploadedFiles_[0].clientFileName());
else
return WT_USTRING();
}
WT_USTRING WFileUpload::contentDescription() const
{
if (!empty())
return WT_USTRING::fromUTF8(uploadedFiles_[0].contentType());
else
return WT_USTRING();
}
void WFileUpload::stealSpooledFile()
{
if (!empty())
uploadedFiles_[0].stealSpoolFile();
}
bool WFileUpload::emptyFileName() const
{
return empty();
}
bool WFileUpload::empty() const
{
return uploadedFiles_.empty();
}
void WFileUpload::updateDom(DomElement& element, bool all)
{
bool containsProgress = progressBar_ && progressBar_->parent() == this;
DomElement *inputE = 0;
if (element.type() != DomElement_INPUT
&& flags_.test(BIT_DO_UPLOAD)
&& containsProgress && !progressBar_->isRendered())
element.addChild(progressBar_->createSDomElement(WApplication::instance()));
// upload() + disable() does not work. -- fix after this release,
// change order of javaScript_ and properties rendering in DomElement
if (fileUploadTarget_ && flags_.test(BIT_DO_UPLOAD)) {
element.callMethod("submit()");
flags_.reset(BIT_DO_UPLOAD);
if (containsProgress) {
inputE = DomElement::getForUpdate("in" + id(), DomElement_INPUT);
inputE->setProperty(PropertyStyleDisplay, "none");
}
}
if (flags_.test(BIT_ENABLED_CHANGED)) {
if (!inputE)
inputE = DomElement::getForUpdate("in" + id(), DomElement_INPUT);
if (isDisabled())
inputE->callMethod("disabled=true");
else
inputE->callMethod("disabled=false");
flags_.reset(BIT_ENABLED_CHANGED);
}
EventSignal<> *change = voidEventSignal(CHANGE_SIGNAL, false);
if (change && change->needsUpdate(all)) {
if (!inputE)
inputE = DomElement::getForUpdate("in" + id(), DomElement_INPUT);
updateSignalConnection(*inputE, *change, "change", all);
}
if (inputE)
element.addChild(inputE);
WWebWidget::updateDom(element, all);
}
void WFileUpload::propagateRenderOk(bool deep)
{
// no need for anything not updated in updateDom()
WWebWidget::propagateRenderOk(deep);
}
DomElementType WFileUpload::domElementType() const
{
return fileUploadTarget_ ? DomElement_FORM : DomElement_INPUT;
}
void WFileUpload::getDomChanges(std::vector<DomElement *>& result,
WApplication *app)
{
if (flags_.test(BIT_ENABLE_AJAX)) {
DomElement *plainE = DomElement::getForUpdate(this, DomElement_INPUT);
DomElement *ajaxE = createDomElement(app);
plainE->replaceWith(ajaxE);
result.push_back(plainE);
} else
WWebWidget::getDomChanges(result, app);
}
DomElement *WFileUpload::createDomElement(WApplication *app)
{
DomElement *result = DomElement::createNew(domElementType());
if (result->type() == DomElement_FORM)
result->setId(id());
else
result->setName(id());
EventSignal<> *change = voidEventSignal(CHANGE_SIGNAL, false);
if (fileUploadTarget_) {
DomElement *i = DomElement::createNew(DomElement_IFRAME);
i->setProperty(PropertyClass, "Wt-resource");
i->setProperty(PropertySrc, fileUploadTarget_->url());
i->setName("if" + id());
if (app->environment().agentIsIE()) {
// http://msdn.microsoft.com/en-us/library/ms536474%28v=vs.85%29.aspx
// HTA's (started by mshta.exe) have a different security model than
// a normal web app, and therefore a HTA browser does not allow
// interaction from iframes to the parent window unless this
// attribute is set. If omitted, this causes the 'uploaded()'
// signal to be blocked when a Wt app is executed as a HTA.
i->setAttribute("APPLICATION", "yes");
}
DomElement *form = result;
form->setAttribute("method", "post");
form->setAttribute("action", fileUploadTarget_->url());
form->setAttribute("enctype", "multipart/form-data");
form->setProperty(PropertyStyle, "margin:0;padding:0;display:inline");
form->setProperty(PropertyTarget, "if" + id());
/*
* wrap iframe in an extra span to work around bug in IE which does
* not set the name use DOM methods
*/
DomElement *d = DomElement::createNew(DomElement_SPAN);
d->addChild(i);
form->addChild(d);
DomElement *input = DomElement::createNew(DomElement_INPUT);
input->setAttribute("type", "file");
if (flags_.test(BIT_MULTIPLE))
input->setAttribute("multiple", "multiple");
input->setAttribute("name", "data");
input->setAttribute("size", boost::lexical_cast<std::string>(textSize_));
input->setId("in" + id());
if (!isEnabled())
input->setProperty(Wt::PropertyDisabled, "true");
if (change)
updateSignalConnection(*input, *change, "change", true);
form->addChild(input);
} else {
result->setAttribute("type", "file");
if (flags_.test(BIT_MULTIPLE))
result->setAttribute("multiple", "multiple");
result->setAttribute("size", boost::lexical_cast<std::string>(textSize_));
if (!isEnabled())
result->setProperty(Wt::PropertyDisabled, "true");
if (change)
updateSignalConnection(*result, *change, "change", true);
}
updateDom(*result, true);
flags_.reset(BIT_ENABLE_AJAX);
return result;
}
void WFileUpload::setFormData(const FormData& formData)
{
setFiles(formData.files);
LOG_DEBUG("setFormData() : " << formData.files.size() << " file(s)");
if (!formData.files.empty())
uploaded().emit();
}
void WFileUpload::setFiles(const std::vector<Http::UploadedFile>& files)
{
uploadedFiles_.clear();
for (unsigned i = 0; i < files.size(); ++i)
if (!files[i].clientFileName().empty())
uploadedFiles_.push_back(files[i]);
}
void WFileUpload::setRequestTooLarge(::int64_t size)
{
fileTooLarge().emit(size);
}
void WFileUpload::upload()
{
if (fileUploadTarget_ && !flags_.test(BIT_UPLOADING)) {
flags_.set(BIT_DO_UPLOAD);
repaint(RepaintPropertyIEMobile);
if (progressBar_) {
if (progressBar_->parent() != this)
hide();
else
progressBar_->show();
}
WApplication::instance()->enableUpdates();
flags_.set(BIT_UPLOADING);
}
}
void WFileUpload::propagateSetEnabled(bool enabled)
{
flags_.set(BIT_ENABLED_CHANGED);
repaint(RepaintPropertyAttribute);
WWebWidget::propagateSetEnabled(enabled);
}
}