C++ TextEncoding::encodingForFormSubmission方法代码示例

PassRefPtr<FormSubmission> FormSubmission::create(HTMLFormElement* form, const Attributes& attributes, PassRefPtr<Event> event, bool lockHistory, FormSubmissionTrigger trigger)
{
    ASSERT(form);
    Document* document = form->document();
    KURL actionURL = document->completeURL(attributes.action().isEmpty() ? document->url().string() : attributes.action());
    bool isMailtoForm = actionURL.protocolIs("mailto");
    bool isMultiPartForm = false;
    String encodingType = attributes.encodingType();

    if (attributes.method() == PostMethod) {
        isMultiPartForm = attributes.isMultiPartForm();
        if (isMultiPartForm && isMailtoForm) {
            encodingType = "application/x-www-form-urlencoded";
            isMultiPartForm = false;
        }
    }

    TextEncoding dataEncoding = isMailtoForm ? UTF8Encoding() : FormDataBuilder::encodingFromAcceptCharset(attributes.acceptCharset(), document);
    RefPtr<DOMFormData> domFormData = DOMFormData::create(dataEncoding.encodingForFormSubmission());
    Vector<pair<String, String> > formValues;

    for (unsigned i = 0; i < form->associatedElements().size(); ++i) {
        HTMLFormControlElement* control = form->associatedElements()[i];
        if (!control->disabled())
            control->appendFormData(*domFormData, isMultiPartForm);
        if (control->hasLocalName(inputTag)) {
            HTMLInputElement* input = static_cast<HTMLInputElement*>(control);
            if (input->isTextField()) {
                formValues.append(pair<String, String>(input->name(), input->value()));
                if (input->isSearchField())
                    input->addSearchResult();
            }
        }
    }

    RefPtr<FormData> formData;
    String boundary;

    if (isMultiPartForm) {
        formData = FormData::createMultiPart(*(static_cast<FormDataList*>(domFormData.get())), domFormData->encoding(), document);
        boundary = formData->boundary().data();
    } else {
        formData = FormData::create(*(static_cast<FormDataList*>(domFormData.get())), domFormData->encoding());
        if (attributes.method() == PostMethod && isMailtoForm) {
            // Convert the form data into a string that we put into the URL.
            appendMailtoPostFormDataToURL(actionURL, *formData, encodingType);
            formData = FormData::create();
        }
    }

    formData->setIdentifier(generateFormDataIdentifier());
    String targetOrBaseTarget = attributes.target().isEmpty() ? document->baseTarget() : attributes.target();
    RefPtr<FormState> formState = FormState::create(form, formValues, document->frame(), trigger);
    return adoptRef(new FormSubmission(attributes.method(), actionURL, targetOrBaseTarget, encodingType, formState.release(), formData.release(), boundary, lockHistory, event));
}

// Constructs a new URL given a base URL and a possibly relative input URL.
// Any query portion of the relative URL will be encoded in the given encoding.
KURL::KURL(const KURL& base,
           const String& relative,
           const TextEncoding& encoding)
{
    m_url.init(base, relative, &encoding.encodingForFormSubmission());
}

Ref<FormSubmission> FormSubmission::create(HTMLFormElement* form, const Attributes& attributes, PassRefPtr<Event> event, LockHistory lockHistory, FormSubmissionTrigger trigger)
{
    ASSERT(form);

    HTMLFormControlElement* submitButton = nullptr;
    if (event && event->target()) {
        for (Node* node = event->target()->toNode(); node; node = node->parentNode()) {
            if (is<HTMLFormControlElement>(*node)) {
                submitButton = downcast<HTMLFormControlElement>(node);
                break;
            }
        }
    }

    FormSubmission::Attributes copiedAttributes;
    copiedAttributes.copyFrom(attributes);
    if (submitButton) {
        AtomicString attributeValue;
        if (!(attributeValue = submitButton->attributeWithoutSynchronization(formactionAttr)).isNull())
            copiedAttributes.parseAction(attributeValue);
        if (!(attributeValue = submitButton->attributeWithoutSynchronization(formenctypeAttr)).isNull())
            copiedAttributes.updateEncodingType(attributeValue);
        if (!(attributeValue = submitButton->attributeWithoutSynchronization(formmethodAttr)).isNull())
            copiedAttributes.updateMethodType(attributeValue);
        if (!(attributeValue = submitButton->attributeWithoutSynchronization(formtargetAttr)).isNull())
            copiedAttributes.setTarget(attributeValue);
    }
    
    Document& document = form->document();
    URL actionURL = document.completeURL(copiedAttributes.action().isEmpty() ? document.url().string() : copiedAttributes.action());
    bool isMailtoForm = actionURL.protocolIs("mailto");
    bool isMultiPartForm = false;
    String encodingType = copiedAttributes.encodingType();

    document.contentSecurityPolicy()->upgradeInsecureRequestIfNeeded(actionURL, ContentSecurityPolicy::InsecureRequestType::FormSubmission);

    if (copiedAttributes.method() == PostMethod) {
        isMultiPartForm = copiedAttributes.isMultiPartForm();
        if (isMultiPartForm && isMailtoForm) {
            encodingType = "application/x-www-form-urlencoded";
            isMultiPartForm = false;
        }
    }

    TextEncoding dataEncoding = isMailtoForm ? UTF8Encoding() : encodingFromAcceptCharset(copiedAttributes.acceptCharset(), document);
    RefPtr<DOMFormData> domFormData = DOMFormData::create(dataEncoding.encodingForFormSubmission());
    Vector<std::pair<String, String>> formValues;

    bool containsPasswordData = false;
    for (auto& control : form->associatedElements()) {
        HTMLElement& element = control->asHTMLElement();
        if (!element.isDisabledFormControl())
            control->appendFormData(*domFormData, isMultiPartForm);
        if (is<HTMLInputElement>(element)) {
            HTMLInputElement& input = downcast<HTMLInputElement>(element);
            if (input.isTextField()) {
                formValues.append(std::pair<String, String>(input.name().string(), input.value()));
                input.addSearchResult();
            }
            if (input.isPasswordField() && !input.value().isEmpty())
                containsPasswordData = true;
        }
    }

    RefPtr<FormData> formData;
    String boundary;

    if (isMultiPartForm) {
        formData = FormData::createMultiPart(*(static_cast<FormDataList*>(domFormData.get())), domFormData->encoding(), &document);
        boundary = formData->boundary().data();
    } else {
        formData = FormData::create(*(static_cast<FormDataList*>(domFormData.get())), domFormData->encoding(), attributes.method() == GetMethod ? FormData::FormURLEncoded : FormData::parseEncodingType(encodingType));
        if (copiedAttributes.method() == PostMethod && isMailtoForm) {
            // Convert the form data into a string that we put into the URL.
            appendMailtoPostFormDataToURL(actionURL, *formData, encodingType);
            formData = FormData::create();
        }
    }

    formData->setIdentifier(generateFormDataIdentifier());
    formData->setContainsPasswordData(containsPasswordData);
    String targetOrBaseTarget = copiedAttributes.target().isEmpty() ? document.baseTarget() : copiedAttributes.target();
    auto formState = FormState::create(form, formValues, &document, trigger);
    return adoptRef(*new FormSubmission(copiedAttributes.method(), actionURL, targetOrBaseTarget, encodingType, WTFMove(formState), WTFMove(formData), boundary, lockHistory, event));
}