forked from mirrors/gecko-dev
045a9ed26a
This patch changes the value of an empty `<input type=file>` control as obtained from the `FormData` API, which used to be an empty string, to be a `File` object with empty contents, whose name is the empty string and whose type is `"application/octet-stream"`. Differential Revision: https://phabricator.services.mozilla.com/D106605
287 lines
9.2 KiB
C++
287 lines
9.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_HTMLFormSubmission_h
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#define mozilla_dom_HTMLFormSubmission_h
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#include "mozilla/Attributes.h"
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#include "mozilla/dom/UserActivation.h"
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#include "mozilla/dom/HTMLDialogElement.h"
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#include "nsCOMPtr.h"
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#include "mozilla/Encoding.h"
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#include "nsString.h"
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class nsIURI;
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class nsIInputStream;
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class nsGenericHTMLElement;
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class nsIMultiplexInputStream;
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namespace mozilla {
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namespace dom {
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class Blob;
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class Directory;
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class Element;
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class HTMLFormElement;
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/**
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* Class for form submissions; encompasses the function to call to submit as
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* well as the form submission name/value pairs
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*/
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class HTMLFormSubmission {
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public:
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/**
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* Get a submission object based on attributes in the form (ENCTYPE and
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* METHOD)
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*
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* @param aForm the form to get a submission object based on
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* @param aSubmitter the submitter element (can be null)
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* @param aFormSubmission the form submission object (out param)
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*/
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static nsresult GetFromForm(HTMLFormElement* aForm,
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nsGenericHTMLElement* aSubmitter,
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NotNull<const Encoding*>& aEncoding,
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HTMLFormSubmission** aFormSubmission);
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MOZ_COUNTED_DTOR_VIRTUAL(HTMLFormSubmission)
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/**
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* Submit a name/value pair
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*
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* @param aName the name of the parameter
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* @param aValue the value of the parameter
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*/
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virtual nsresult AddNameValuePair(const nsAString& aName,
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const nsAString& aValue) = 0;
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/**
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* Submit a name/blob pair
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*
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* @param aName the name of the parameter
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* @param aBlob the blob to submit. The file's name will be used if the Blob
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* is actually a File, otherwise 'blob' string is used instead. Must not be
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* null.
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*/
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virtual nsresult AddNameBlobPair(const nsAString& aName, Blob* aBlob) = 0;
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/**
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* Submit a name/directory pair
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*
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* @param aName the name of the parameter
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* @param aBlob the directory to submit.
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*/
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virtual nsresult AddNameDirectoryPair(const nsAString& aName,
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Directory* aDirectory) = 0;
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/**
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* Given a URI and the current submission, create the final URI and data
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* stream that will be submitted. Subclasses *must* implement this.
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*
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* @param aURI the URI being submitted to [IN]
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* @param aPostDataStream a data stream for POST data [OUT]
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* @param aOutURI the resulting URI. May be the same as aURI [OUT]
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*/
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virtual nsresult GetEncodedSubmission(nsIURI* aURI,
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nsIInputStream** aPostDataStream,
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nsCOMPtr<nsIURI>& aOutURI) = 0;
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/**
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* Get the charset that will be used for submission.
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*/
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void GetCharset(nsACString& aCharset) { mEncoding->Name(aCharset); }
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Element* GetSubmitterElement() const { return mSubmitter.get(); }
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/**
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* Get the action URI that will be used for submission.
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*/
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nsIURI* GetActionURL() const { return mActionURL; }
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/**
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* Get the target that will be used for submission.
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*/
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void GetTarget(nsAString& aTarget) { aTarget = mTarget; }
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/**
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* Return true if this form submission was user-initiated.
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*/
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bool IsInitiatedFromUserInput() const { return mInitiatedFromUserInput; }
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virtual DialogFormSubmission* GetAsDialogSubmission() { return nullptr; }
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protected:
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/**
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* Can only be constructed by subclasses.
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*
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* @param aEncoding the character encoding of the form
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* @param aSubmitter the submitter element (can be null)
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*/
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HTMLFormSubmission(nsIURI* aActionURL, const nsAString& aTarget,
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mozilla::NotNull<const mozilla::Encoding*> aEncoding,
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Element* aSubmitter);
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// The action url.
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nsCOMPtr<nsIURI> mActionURL;
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// The target.
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nsString mTarget;
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// The character encoding of this form submission
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mozilla::NotNull<const mozilla::Encoding*> mEncoding;
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// Submitter element.
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RefPtr<Element> mSubmitter;
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// Keep track of whether this form submission was user-initiated or not
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bool mInitiatedFromUserInput;
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};
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class EncodingFormSubmission : public HTMLFormSubmission {
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public:
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EncodingFormSubmission(nsIURI* aActionURL, const nsAString& aTarget,
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mozilla::NotNull<const mozilla::Encoding*> aEncoding,
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Element* aSubmitter);
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virtual ~EncodingFormSubmission();
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/**
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* Encode a Unicode string to bytes using the encoder (or just copy the input
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* if there is no encoder).
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* @param aStr the string to encode
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* @param aResult the encoded string [OUT]
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* @param aHeaderEncode If true, turns all linebreaks into spaces and escapes
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* all quotes
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* @throws an error if UnicodeToNewBytes fails
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*/
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nsresult EncodeVal(const nsAString& aStr, nsCString& aResult,
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bool aHeaderEncode);
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};
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class DialogFormSubmission final : public HTMLFormSubmission {
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public:
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DialogFormSubmission(nsAString& aResult, nsIURI* aActionURL,
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const nsAString& aTarget,
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NotNull<const Encoding*> aEncoding, Element* aSubmitter,
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HTMLDialogElement* aDialogElement)
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: HTMLFormSubmission(aActionURL, aTarget, aEncoding, aSubmitter),
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mDialogElement(aDialogElement),
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mReturnValue(aResult) {}
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nsresult AddNameValuePair(const nsAString& aName,
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const nsAString& aValue) override {
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MOZ_CRASH("This method should not be called");
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return NS_OK;
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}
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nsresult AddNameBlobPair(const nsAString& aName, Blob* aBlob) override {
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MOZ_CRASH("This method should not be called");
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return NS_OK;
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}
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nsresult AddNameDirectoryPair(const nsAString& aName,
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Directory* aDirectory) override {
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MOZ_CRASH("This method should not be called");
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return NS_OK;
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}
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nsresult GetEncodedSubmission(nsIURI* aURI, nsIInputStream** aPostDataStream,
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nsCOMPtr<nsIURI>& aOutURI) override {
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MOZ_CRASH("This method should not be called");
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return NS_OK;
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}
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DialogFormSubmission* GetAsDialogSubmission() override { return this; }
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HTMLDialogElement* DialogElement() { return mDialogElement; }
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nsString& ReturnValue() { return mReturnValue; }
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private:
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const RefPtr<HTMLDialogElement> mDialogElement;
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nsString mReturnValue;
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};
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/**
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* Handle multipart/form-data encoding, which does files as well as normal
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* inputs. This always does POST.
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*/
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class FSMultipartFormData : public EncodingFormSubmission {
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public:
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/**
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* @param aEncoding the character encoding of the form
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*/
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FSMultipartFormData(nsIURI* aActionURL, const nsAString& aTarget,
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mozilla::NotNull<const mozilla::Encoding*> aEncoding,
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Element* aSubmitter);
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~FSMultipartFormData();
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virtual nsresult AddNameValuePair(const nsAString& aName,
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const nsAString& aValue) override;
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virtual nsresult AddNameBlobPair(const nsAString& aName,
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Blob* aBlob) override;
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virtual nsresult AddNameDirectoryPair(const nsAString& aName,
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Directory* aDirectory) override;
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virtual nsresult GetEncodedSubmission(nsIURI* aURI,
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nsIInputStream** aPostDataStream,
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nsCOMPtr<nsIURI>& aOutURI) override;
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void GetContentType(nsACString& aContentType) {
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aContentType = "multipart/form-data; boundary="_ns + mBoundary;
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}
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nsIInputStream* GetSubmissionBody(uint64_t* aContentLength);
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protected:
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/**
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* Roll up the data we have so far and add it to the multiplexed data stream.
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*/
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nsresult AddPostDataStream();
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private:
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void AddDataChunk(const nsACString& aName, const nsACString& aFilename,
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const nsACString& aContentType,
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nsIInputStream* aInputStream, uint64_t aInputStreamSize);
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/**
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* The post data stream as it is so far. This is a collection of smaller
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* chunks--string streams and file streams interleaved to make one big POST
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* stream.
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*/
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nsCOMPtr<nsIMultiplexInputStream> mPostData;
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/**
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* The same stream, but as an nsIInputStream.
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* Raw pointers because it is just QI of mInputStream.
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*/
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nsIInputStream* mPostDataStream;
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/**
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* The current string chunk. When a file is hit, the string chunk gets
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* wrapped up into an input stream and put into mPostDataStream so that the
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* file input stream can then be appended and everything is in the right
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* order. Then the string chunk gets appended to again as we process more
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* name/value pairs.
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*/
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nsCString mPostDataChunk;
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/**
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* The boundary string to use after each "part" (the boundary that marks the
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* end of a value). This is computed randomly and is different for each
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* submission.
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*/
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nsCString mBoundary;
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/**
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* The total length in bytes of the streams that make up mPostDataStream
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*/
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uint64_t mTotalLength;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_HTMLFormSubmission_h */
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