зеркало из https://github.com/mozilla/gecko-dev.git
246 строки
7.6 KiB
C++
246 строки
7.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#include "nsString.h"
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#include "nsIUnicodeEncoder.h"
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#include "nsIUnicodeDecoder.h"
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#include "nsITextToSubURI.h"
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#include "nsEscape.h"
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#include "nsTextToSubURI.h"
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#include "nsCRT.h"
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#include "mozilla/dom/EncodingUtils.h"
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using mozilla::dom::EncodingUtils;
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nsTextToSubURI::nsTextToSubURI()
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{
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}
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nsTextToSubURI::~nsTextToSubURI()
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{
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}
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NS_IMPL_ISUPPORTS(nsTextToSubURI, nsITextToSubURI)
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NS_IMETHODIMP nsTextToSubURI::ConvertAndEscape(
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const char *charset, const char16_t *text, char **_retval)
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{
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if (!_retval) {
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return NS_ERROR_NULL_POINTER;
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}
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*_retval = nullptr;
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nsresult rv = NS_OK;
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if (!charset) {
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return NS_ERROR_NULL_POINTER;
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}
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nsDependentCString label(charset);
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nsAutoCString encoding;
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if (!EncodingUtils::FindEncodingForLabelNoReplacement(label, encoding)) {
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return NS_ERROR_UCONV_NOCONV;
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}
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nsCOMPtr<nsIUnicodeEncoder> encoder =
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EncodingUtils::EncoderForEncoding(encoding);
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rv = encoder->SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace, nullptr, (char16_t)'?');
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if (NS_SUCCEEDED(rv) ) {
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char buf[256];
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char *pBuf = buf;
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int32_t ulen = text ? NS_strlen(text) : 0;
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int32_t outlen = 0;
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if (NS_SUCCEEDED(rv = encoder->GetMaxLength(text, ulen, &outlen))) {
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if (outlen >= 256) {
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pBuf = (char*)NS_Alloc(outlen+1);
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}
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if (nullptr == pBuf) {
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outlen = 255;
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pBuf = buf;
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}
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int32_t bufLen = outlen;
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if (NS_SUCCEEDED(rv = encoder->Convert(text,&ulen, pBuf, &outlen))) {
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// put termination characters (e.g. ESC(B of ISO-2022-JP) if necessary
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int32_t finLen = bufLen - outlen;
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if (finLen > 0) {
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if (NS_SUCCEEDED(encoder->Finish((char *)(pBuf+outlen), &finLen))) {
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outlen += finLen;
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}
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}
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pBuf[outlen] = '\0';
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*_retval = nsEscape(pBuf, url_XPAlphas);
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if (nullptr == *_retval) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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}
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}
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}
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if (pBuf != buf) {
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NS_Free(pBuf);
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}
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}
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return rv;
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}
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NS_IMETHODIMP nsTextToSubURI::UnEscapeAndConvert(
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const char *charset, const char *text, char16_t **_retval)
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{
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if(nullptr == _retval)
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return NS_ERROR_NULL_POINTER;
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if(nullptr == text) {
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// set empty string instead of returning error
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// due to compatibility for old version
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text = "";
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}
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*_retval = nullptr;
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nsresult rv = NS_OK;
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if (!charset) {
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return NS_ERROR_NULL_POINTER;
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}
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// unescape the string, unescape changes the input
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char *unescaped = NS_strdup(text);
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if (nullptr == unescaped)
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return NS_ERROR_OUT_OF_MEMORY;
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unescaped = nsUnescape(unescaped);
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NS_ASSERTION(unescaped, "nsUnescape returned null");
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nsDependentCString label(charset);
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nsAutoCString encoding;
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if (!EncodingUtils::FindEncodingForLabelNoReplacement(label, encoding)) {
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return NS_ERROR_UCONV_NOCONV;
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}
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nsCOMPtr<nsIUnicodeDecoder> decoder =
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EncodingUtils::DecoderForEncoding(encoding);
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char16_t *pBuf = nullptr;
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int32_t len = strlen(unescaped);
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int32_t outlen = 0;
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if (NS_SUCCEEDED(rv = decoder->GetMaxLength(unescaped, len, &outlen))) {
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pBuf = (char16_t *) NS_Alloc((outlen+1)*sizeof(char16_t));
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if (nullptr == pBuf) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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} else {
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if (NS_SUCCEEDED(rv = decoder->Convert(unescaped, &len, pBuf, &outlen))) {
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pBuf[outlen] = 0;
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*_retval = pBuf;
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} else {
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NS_Free(pBuf);
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}
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}
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}
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NS_Free(unescaped);
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return rv;
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}
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static bool statefulCharset(const char *charset)
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{
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// HZ, UTF-7 and the CN and KR ISO-2022 variants are no longer in
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// mozilla-central but keeping them here just in case for the benefit of
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// comm-central.
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if (!nsCRT::strncasecmp(charset, "ISO-2022-", sizeof("ISO-2022-")-1) ||
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!nsCRT::strcasecmp(charset, "UTF-7") ||
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!nsCRT::strcasecmp(charset, "HZ-GB-2312"))
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return true;
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return false;
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}
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nsresult nsTextToSubURI::convertURItoUnicode(const nsAFlatCString &aCharset,
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const nsAFlatCString &aURI,
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bool aIRI,
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nsAString &_retval)
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{
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nsresult rv = NS_OK;
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// check for 7bit encoding the data may not be ASCII after we decode
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bool isStatefulCharset = statefulCharset(aCharset.get());
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if (!isStatefulCharset && IsASCII(aURI)) {
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CopyASCIItoUTF16(aURI, _retval);
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return rv;
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}
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if (!isStatefulCharset && aIRI) {
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if (IsUTF8(aURI)) {
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CopyUTF8toUTF16(aURI, _retval);
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return rv;
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}
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}
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// empty charset could indicate UTF-8, but aURI turns out not to be UTF-8.
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NS_ENSURE_FALSE(aCharset.IsEmpty(), NS_ERROR_INVALID_ARG);
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nsAutoCString encoding;
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if (!EncodingUtils::FindEncodingForLabelNoReplacement(aCharset, encoding)) {
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return NS_ERROR_UCONV_NOCONV;
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}
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nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder =
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EncodingUtils::DecoderForEncoding(encoding);
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NS_ENSURE_SUCCESS(rv, rv);
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unicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Signal);
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int32_t srcLen = aURI.Length();
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int32_t dstLen;
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rv = unicodeDecoder->GetMaxLength(aURI.get(), srcLen, &dstLen);
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NS_ENSURE_SUCCESS(rv, rv);
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char16_t *ustr = (char16_t *) NS_Alloc(dstLen * sizeof(char16_t));
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NS_ENSURE_TRUE(ustr, NS_ERROR_OUT_OF_MEMORY);
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rv = unicodeDecoder->Convert(aURI.get(), &srcLen, ustr, &dstLen);
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if (NS_SUCCEEDED(rv))
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_retval.Assign(ustr, dstLen);
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NS_Free(ustr);
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return rv;
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}
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NS_IMETHODIMP nsTextToSubURI::UnEscapeURIForUI(const nsACString & aCharset,
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const nsACString &aURIFragment,
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nsAString &_retval)
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{
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nsAutoCString unescapedSpec;
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// skip control octets (0x00 - 0x1f and 0x7f) when unescaping
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NS_UnescapeURL(PromiseFlatCString(aURIFragment),
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esc_SkipControl | esc_AlwaysCopy, unescapedSpec);
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// in case of failure, return escaped URI
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// Test for != NS_OK rather than NS_FAILED, because incomplete multi-byte
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// sequences are also considered failure in this context
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if (convertURItoUnicode(
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PromiseFlatCString(aCharset), unescapedSpec, true, _retval)
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!= NS_OK)
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// assume UTF-8 instead of ASCII because hostname (IDN) may be in UTF-8
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CopyUTF8toUTF16(aURIFragment, _retval);
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return NS_OK;
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}
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NS_IMETHODIMP nsTextToSubURI::UnEscapeNonAsciiURI(const nsACString & aCharset,
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const nsACString & aURIFragment,
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nsAString &_retval)
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{
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nsAutoCString unescapedSpec;
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NS_UnescapeURL(PromiseFlatCString(aURIFragment),
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esc_AlwaysCopy | esc_OnlyNonASCII, unescapedSpec);
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// leave the URI as it is if it's not UTF-8 and aCharset is not a ASCII
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// superset since converting "http:" with such an encoding is always a bad
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// idea.
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if (!IsUTF8(unescapedSpec) &&
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(aCharset.LowerCaseEqualsLiteral("utf-16") ||
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aCharset.LowerCaseEqualsLiteral("utf-16be") ||
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aCharset.LowerCaseEqualsLiteral("utf-16le") ||
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aCharset.LowerCaseEqualsLiteral("utf-7") ||
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aCharset.LowerCaseEqualsLiteral("x-imap4-modified-utf7"))){
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CopyASCIItoUTF16(aURIFragment, _retval);
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return NS_OK;
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}
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return convertURItoUnicode(PromiseFlatCString(aCharset), unescapedSpec, true, _retval);
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}
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//----------------------------------------------------------------------
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