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gecko-dev/lib/layout/layscrip.c
nisheeth 4ef6d926ad Fix for bug 232611 which was a duplicate of bug 120234 which got fixed in 4.06. 
Fix was reviewed by rjc and dp when it went into the 4.06 branch.
Fixed the case where an unclosed single quote in a
tag causes the STYLE attribute to not be found. This was causing
an infinite loop where layout would process the style attribute repeatedly.
See bug report for details. Affected code is inside lo_ProcessStyleAttribute().
1998-07-07 05:57:50 +00:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "xp.h"
/*
* SCRIPT tag support.
*/
#include "libmocha.h"
#include "lo_ele.h"
#include "net.h"
#include "pa_parse.h"
#include "pa_tags.h"
#include "layout.h"
#include "libevent.h"
#include "css.h"
#include "laystyle.h"
#include "mcom_db.h"
#include "laylayer.h"
#include "prefapi.h"
static char lo_jsAllowFileSrcFromNonFile[]
= "javascript.allow.file_src_from_non_file";
/*
* XXX Should dynamic layer resize-reload really rerun scripts, potentially
* XXX destroying and reinitializing JS state? An onResize event handler
* XXX would be consistent with how windows and static layers resize-reload.
*/
#define SCRIPT_EXEC_OK(top_state, state, type, script_type) \
(top_state->resize_reload == FALSE || \
type != script_type || \
(lo_InsideLayer(state) && (lo_IsAnyCurrentAncestorDynamic(state) || \
lo_IsAnyCurrentAncestorSourced(state))))
static void
lo_ParseScriptLanguage(MWContext * context, PA_Tag * tag, int8 * type,
JSVersion * version)
{
PA_Block buff;
char * str;
buff = lo_FetchParamValue(context, tag, PARAM_LANGUAGE);
if (buff != NULL) {
PA_LOCK(str, char *, buff);
if ((XP_STRCASECMP(str, js_language_name) == 0) ||
(XP_STRCASECMP(str, "LiveScript") == 0) ||
(XP_STRCASECMP(str, "Mocha") == 0)) {
*type = SCRIPT_TYPE_MOCHA;
*version = JSVERSION_DEFAULT;
}
else if (XP_STRCASECMP(str, "JavaScript1.1") == 0) {
*type = SCRIPT_TYPE_MOCHA;
*version = JSVERSION_1_1;
}
else if (XP_STRCASECMP(str, "JavaScript1.2") == 0) {
*type = SCRIPT_TYPE_MOCHA;
*version = JSVERSION_1_2;
}
else if (XP_STRCASECMP(str, "JavaScript1.3") == 0) {
*type = SCRIPT_TYPE_MOCHA;
*version = JSVERSION_1_3;
}
else {
*type = SCRIPT_TYPE_UNKNOWN;
}
PA_FREE(buff);
}
}
void
lo_BlockScriptTag(MWContext *context, lo_DocState *state, PA_Tag *tag)
{
lo_TopState *top_state;
pa_DocData *doc_data;
if (!LM_CanDoJS(context))
return;
/*
* Find the parser stream from its private data, doc_data, pointed at by
* a top_state member for just this situation.
*/
top_state = state->top_state;
doc_data = top_state->doc_data;
XP_ASSERT(doc_data != NULL && doc_data->url_struct != NULL);
if (doc_data == NULL || doc_data->url_struct == NULL) /* XXX paranoia */
return;
/*
* The parser must not parse ahead after a script or style end-tag, or
* it could get into a brute_tag state (XMP, PRE, etc.) and enter a mode
* that would mess up document.writes coming from the script or style.
* So we put it into overflow mode here, and decrement overflow when we
* unblock.
*
* We test tag first to handle the call from lo_ProcessScriptTag, which
* wants us to create an input state if needed, but not to count comment
* bytes via lo_data. Sad to say, this means lo_ProcessScriptTag must
* also increment doc_data->overflow, but only if tag->is_end == 1 (a.k.a.
* PR_TRUE), meaning the script tag was not blocked by an earlier blocking
* tag that caused it to go through here and set is_end to 2. XXX we can
* do this only because all layout and libparse tests of is_end are of the
* form "tag->is_end == FALSE".
*/
if (tag) {
/* Tag non-null means we're called from lo_BlockTag in layout.c. */
if (tag->is_end == FALSE) {
int8 script_type;
JSVersion ver;
/* Keep track of whether we're in a script or style container... */
script_type = SCRIPT_TYPE_UNKNOWN;
lo_ParseScriptLanguage(context, tag, &script_type, &ver);
if (tag->type == P_STYLE || tag->type == P_LINK ||
script_type != SCRIPT_TYPE_UNKNOWN)
top_state->in_blocked_script = TRUE;
}
else if (top_state->in_blocked_script) {
/* ...so we can avoid overflowing the parser on superfluous end
* tags, such as those emitted by libmime.
*/
top_state->in_blocked_script = FALSE;
if (SCRIPT_EXEC_OK(top_state, state, tag->type, P_SCRIPT)) {
tag->is_end = (PRPackedBool)2;
PA_PushOverflow(doc_data);
doc_data->overflow_depth ++;
}
}
}
/*
* Count the bytes of HTML comments and heuristicly "lost" newlines in
* tag so lo_ProcessScriptTag can recover it there later, in preference
* to the (then far-advanced) value of doc_data->comment_bytes. Ensure
* that this hack is not confused for NULL by adding 1 here and taking
* it away later. Big XXX for future cleanup, needless to say.
*/
if (tag)
tag->lo_data = (void *)(doc_data->comment_bytes + 1);
if (top_state->script_tag_count++ == 0)
ET_SetDecoderStream(context, doc_data->parser_stream,
doc_data->url_struct, JS_FALSE);
}
typedef struct {
MWContext *context;
lo_DocState *state;
PA_Tag *tag;
char *url, *archiveSrc, *id, *codebase;
char *buffer;
uint32 bufferSize;
JSVersion version;
JSBool inlineSigned;
} ScriptData;
void
lo_DestroyScriptData(void *arg)
{
ScriptData *data = arg;
if (data == NULL)
return;
XP_FREEIF(data->url);
XP_FREEIF(data->archiveSrc);
XP_FREEIF(data->id);
XP_FREEIF(data->codebase);
XP_FREEIF(data->buffer);
if (data->tag)
PA_FreeTag(data->tag);
XP_FREE(data);
}
static void
lo_script_src_exit_fn(URL_Struct *url_struct, int status, MWContext *context);
static void
lo_script_archive_exit_fn(URL_Struct *url_struct, int status, MWContext *context);
static Bool
lo_create_script_blockage(MWContext *context, lo_DocState *state, int type)
{
lo_TopState *top_state;
LO_Element *block_ele;
top_state = state->top_state;
if (!top_state) {
XP_ASSERT(0);
return FALSE;
}
block_ele = lo_NewElement(context, state, LO_SCRIPT, NULL, 0);
if (block_ele == NULL) {
top_state->out_of_memory = TRUE;
return FALSE;
}
block_ele->type = type;
block_ele->lo_any.ele_id = NEXT_ELEMENT;
top_state->layout_blocking_element = block_ele;
if (type == LO_SCRIPT)
top_state->current_script = block_ele;
return TRUE;
}
/*
* used for ARCHIVE= and SRC=
* Create name of form "archive.jar/src.js"
*/
static char *
lo_BuildJSArchiveURL( char *archive_name, char *filename )
{
uint32 len = XP_STRLEN(archive_name) + XP_STRLEN(filename) + 2;
char *path = XP_ALLOC(len);
if (path)
{
XP_STRCPY(path, archive_name);
XP_STRCAT(path, "/");
XP_STRCAT(path, filename);
}
return path;
}
/*
* Load a document from an external URL. Assumes that layout is
* already blocked
*/
static void
lo_GetScriptFromURL(ScriptData *data, int script_type)
{
URL_Struct *url_struct;
lo_TopState *top_state = data->state->top_state;
PA_Tag *tag = data->tag;
url_struct = NET_CreateURLStruct(data->url, top_state->force_reload);
if (url_struct == NULL) {
top_state->out_of_memory = TRUE;
lo_DestroyScriptData(data);
return;
}
url_struct->must_cache = TRUE;
url_struct->preset_content_type = TRUE;
if (script_type == SCRIPT_TYPE_CSS) {
StrAllocCopy(url_struct->content_type, TEXT_CSS);
} else {
if (tag->type == P_STYLE || tag->type == P_LINK) {
StrAllocCopy(url_struct->content_type, TEXT_JSSS);
} else {
StrAllocCopy(url_struct->content_type, js_content_type);
}
}
XP_ASSERT(top_state->layout_blocking_element);
if (!url_struct->content_type)
goto out;
if (!data->inlineSigned) {
if (data->archiveSrc) {
/* ARCHIVE= and SRC= */
/*
* Need to set nesting url. Create name of form
* "archive.jar/src.js"
*/
char *path = lo_BuildJSArchiveURL(url_struct->address,
data->archiveSrc);
if (!path)
goto out;
ET_SetNestingUrl(data->context, path);
/* version taken care of in lo_script_archive_exit_fn */
XP_FREE(path);
} else {
/* SRC= but no ARCHIVE= */
ET_SetNestingUrl(data->context, url_struct->address);
ET_SetVersion(data->context, data->version);
}
}
url_struct->fe_data = data;
if (data->archiveSrc != NULL || data->inlineSigned) {
NET_GetURL(url_struct,
FO_CACHE_ONLY,
data->context,
lo_script_archive_exit_fn);
} else {
NET_GetURL(url_struct,
FO_CACHE_AND_PRESENT,
data->context,
lo_script_src_exit_fn);
}
return;
out:
top_state->out_of_memory = TRUE;
NET_FreeURLStruct(url_struct);
lo_DestroyScriptData(data);
return;
}
/*
* A script has just completed. If we are blocked on that script
* free the blockage
*/
static void
lo_unblock_script_tag(MWContext * context, Bool messWithParser)
{
lo_TopState *top_state;
lo_DocState *state;
LO_Element * block_ele;
LO_Element * current_script;
PA_Tag * tag;
NET_StreamClass stream;
top_state = lo_FetchTopState(XP_DOCID(context));
if (!top_state || !top_state->doc_state)
return;
state = top_state->doc_state;
/*
* Remember the fake element we created but clear the current
* script flag of the top_state since the FlushBlockage call
* might just turn around and block us on another script
*/
current_script = top_state->current_script;
top_state->current_script = NULL;
/*
* if we are finishing a nested script make sure the current_script
* points to our parent script
*/
for (tag = top_state->tags; tag; tag = tag->next) {
if (tag->type == P_NSCP_REBLOCK) {
top_state->current_script = tag->lo_data;
break;
}
}
/* Flush tags blocked by this <SCRIPT SRC="URL"> tag. */
block_ele = top_state->layout_blocking_element;
/* no longer in a script */
top_state->in_script = SCRIPT_TYPE_NOT;
/*
* we must be blocked on something either the script that just ended or
* some other object
*/
if (!block_ele)
goto done;
if (messWithParser && top_state->doc_data &&
SCRIPT_EXEC_OK(top_state, state, block_ele->type, LO_SCRIPT)) {
top_state->doc_data->overflow_depth --;
XP_ASSERT(top_state->doc_data->overflow_depth >= 0);
}
lo_FlushLineBuffer(context, top_state->doc_state);
/*
* unblock on UNKNOWN's as well since that's the type for
* style attribute scripts
*/
if (block_ele->type == LO_SCRIPT || block_ele->type == LO_UNKNOWN) {
lo_UnblockLayout(context, top_state);
}
else {
/*
* we're still blocked on something else - make sure
* there are no reblock tags that are going to hose
* us. Find the reblock tags that point to our script
* tag and render them hermless
*/
PA_Tag * tag;
for (tag = top_state->tags; tag; tag = tag->next) {
if (tag->type == P_NSCP_REBLOCK) {
LO_Element * lo_ele = tag->lo_data;
if (lo_ele == current_script) {
tag->lo_data = NULL;
}
}
}
}
/* free the fake element we created earlier */
lo_FreeElement(context, current_script, FALSE);
done:
/* the parser is now able to receive new data from netlib */
stream.data_object=(pa_DocData *)top_state->doc_data;
pa_FlushOverflow(&stream);
/*
* The initial call to lo_UnblockLayout() might have not torn
* everything down because we were waiting for the last
* chunk of data to come out of the doc_data->overflow_buf
* We need to get to lo_FlushedBlockedTags() and lo_FinishLayout()
* at the bottom of lo_FlushBlockage().
*/
if (!top_state->layout_blocking_element)
lo_FlushBlockage(context, top_state->doc_state, top_state->doc_state);
}
static void
lo_script_src_exit_fn(URL_Struct *url_struct, int status, MWContext *context)
{
lo_DestroyScriptData(url_struct->fe_data);
NET_FreeURLStruct(url_struct);
/*
* If our status is negative that means there was an error and the
* script won't be executed. Therefore the MochaDecoder's nesting
* url must be cleared, and layout must be unblocked.
*/
if (status < 0) {
ET_SetNestingUrl(context, NULL);
lo_unblock_script_tag(context, TRUE);
}
}
static void
lo_script_archive_exit_fn(URL_Struct *url_struct, int status, MWContext *context)
{
ScriptData *data = NULL;
#ifdef JAVA
/* Vars only used in JAVA context */
char *name;
JSPrincipals *principals;
#endif
ETEvalStuff * stuff;
data = (ScriptData *) url_struct->fe_data;
stuff = (ETEvalStuff *) XP_NEW_ZAP(ETEvalStuff);
if (!stuff)
return;
stuff->line_no = 1;
stuff->scope_to = NULL;
stuff->want_result = JS_FALSE;
stuff->version = data->version;
stuff->data = context;
#ifndef JAVA
/* No Java; execute without principals. */
if (data->buffer) {
stuff->principals = NULL;
ET_EvaluateScript(context, data->buffer, stuff, lo_ScriptEvalExitFn);
}
else {
XP_FREE(stuff);
}
#else
name = data->archiveSrc ? data->archiveSrc : data->id;
principals = LM_NewJSPrincipals(url_struct, name, data->codebase);
if (principals != NULL) {
char *src;
uint srcSize;
if (data->archiveSrc) {
/* Extract from archive using "SRC=" value */
src = LM_ExtractFromPrincipalsArchive(principals, data->archiveSrc,
&srcSize);
#ifdef JSDEBUGGER
if( src != NULL && LM_GetJSDebugActive() )
{
char *path = lo_BuildJSArchiveURL(url_struct->address,
data->archiveSrc);
if (path)
{
LM_JamSourceIntoJSDebug( path, src, srcSize, context );
XP_FREE(path);
}
}
#endif /* JSDEBUGGER */
if (src == NULL) {
/* Unsuccessful extracting from archive. Now try normal SRC= lookup. */
(*principals->destroy)(NULL, principals);
data->url = NET_MakeAbsoluteURL(data->state->top_state->base_url,
data->archiveSrc);
XP_FREEIF(data->archiveSrc);
data->archiveSrc = NULL;
lo_GetScriptFromURL(data, data->state->top_state->in_script);
goto out;
}
} else {
/* Should be an inline script */
src = data->buffer;
srcSize = data->bufferSize;
}
stuff->len = srcSize;
stuff->principals = principals;
ET_EvaluateScript(context, src, stuff, lo_ScriptEvalExitFn);
if (data->archiveSrc){
ET_SetNestingUrl(context, NULL);
XP_FREE(src);
}
}
else {
XP_FREE(stuff);
}
#endif /* ifdef JAVA */
lo_DestroyScriptData(data);
#ifdef JAVA /* Label only used in this context */
out:
#endif
/* Always free (or drop a ref on) the url_struct before returning. */
NET_FreeURLStruct(url_struct);
}
/*
* This function gets called when the LM_EvaluateBuffer() operation
* completes (in the mocha thread, but we run in the mozilla thread
* here)
*/
void
lo_ScriptEvalExitFn(void * data, char * str, size_t len, char * wysiwyg_url,
char * base_href, Bool valid)
{
/* we don't care about the strings here just kill them */
XP_FREEIF(str);
XP_FREEIF(wysiwyg_url);
XP_FREEIF(base_href);
lo_unblock_script_tag(data, TRUE);
}
/*
* This function gets called when the LM_EvaluateBuffer() operation
* completes (in the mocha thread, but we run in the mozilla thread
* here)
*/
PRIVATE
void
lo_StyleEvalExitFn(void * data, char * str, size_t len, char * wysiwyg_url,
char * base_href, Bool valid)
{
/* we don't care about the strings here just kill them */
XP_FREEIF(str);
XP_FREEIF(wysiwyg_url);
XP_FREEIF(base_href);
lo_unblock_script_tag(data, FALSE);
}
void
lo_UnblockLayout(MWContext *context, lo_TopState *top_state)
{
XP_ASSERT(top_state && top_state->doc_state);
if (!top_state || !top_state->doc_state)
return;
top_state->layout_blocking_element = NULL;
lo_FlushBlockage(context, top_state->doc_state, top_state->doc_state);
}
Bool
lo_CloneTagAndBlockLayout(MWContext *context, lo_DocState *state, PA_Tag *tag)
{
PA_Tag *new_tag;
lo_TopState * top_state = state->top_state;
/*
* Since we're adding tags to the blocked tags list without going through
* lo_BlockTag, we need to see if this is a flushed to block transition
* and, if so, add to the doc_data's ref count. We don't want to do this
* if we're in the process of flushing blockage - in that case, the count
* has already been incremented.
*/
if (top_state->tags == NULL && top_state->flushing_blockage == FALSE)
PA_HoldDocData(top_state->doc_data);
/*
* stick the current tag onto the front of the tag list
*/
new_tag = PA_CloneMDLTag(tag);
if (!new_tag) {
top_state->out_of_memory = TRUE;
return FALSE;
}
new_tag->next = top_state->tags;
top_state->tags = new_tag;
if (top_state->tags_end == &top_state->tags)
top_state->tags_end = &new_tag->next;
return lo_create_script_blockage(context, state, LO_UNKNOWN);
}
/* evaluate the buffer encompassed by the style attribute on any tag.
* this will be JSS or CSS
*
* Returns TRUE if it needs to block layout
* Returns FALSE if not.
*/
XP_Bool
lo_ProcessStyleAttribute(MWContext *context, lo_DocState *state, PA_Tag *tag, char *script_buff)
{
lo_TopState *top_state;
char *scope_to = NULL;
int32 script_buff_len;
char *new_id;
XP_Bool in_double_quote=FALSE, in_single_quote=FALSE;
char *ptr, *end;
ETEvalStuff * stuff;
if (!state)
{
XP_FREEIF(script_buff);
return FALSE;
}
if (!script_buff)
return FALSE;
/* @@@ A bit of a hack.
* Get rid of the style attribute in the tag->data so that we don't
* go circular
*
* get rid of STYLE by rewriting it as SYTLE so that the parser
* ignores it :)
*/
for (ptr=(char*)tag->data, end = ptr+tag->data_len; ptr < end; ptr++) {
if (*ptr == '"') {
/* Fix for bug #120234. Ignore double quotes while inside single quoted attribute. */
if (!in_single_quote)
in_double_quote = !in_double_quote;
}
else if (*ptr == '\'') {
/* Fix for bug #120234. Ignore single quotes while inside double quoted attribute. */
if (!in_double_quote)
in_single_quote = !in_single_quote;
}
else if (!in_single_quote &&
!in_double_quote &&
!strncasecomp(ptr, PARAM_STYLE, sizeof(PARAM_STYLE)-1)) {
*ptr = 'T'; /* ttyle NOT style */
break;
}
}
script_buff_len = XP_STRLEN(script_buff);
top_state = state->top_state;
/* get the tag ID if it has one */
new_id = (char *)lo_FetchParamValue(context, tag, PARAM_ID);
if (!new_id)
new_id = PR_smprintf(NSIMPLICITID"%ld", top_state->tag_count);
if (!new_id)
return FALSE;
if (top_state->default_style_script_type == SCRIPT_TYPE_JSSS ||
top_state->default_style_script_type == SCRIPT_TYPE_MOCHA) {
StrAllocCopy(scope_to, "document.ids.");
StrAllocCat(scope_to, new_id);
if (!scope_to) {
XP_FREE(new_id);
return(FALSE);
}
}
else if (top_state->default_style_script_type == SCRIPT_TYPE_CSS) {
char *new_jss_buff;
int32 new_jss_buff_len;
char *new_css_buff;
int32 new_css_buff_len;
/* scope the css to the ns implicit ID */
new_css_buff = PR_smprintf("#%s { %s }", new_id, script_buff);
XP_FREE(script_buff);
if (!new_css_buff) {
XP_FREE(new_id);
return FALSE;
}
new_css_buff_len = XP_STRLEN(new_css_buff);
/* convert to JSS */
CSS_ConvertToJS(new_css_buff,
new_css_buff_len,
&new_jss_buff,
&new_jss_buff_len);
XP_FREE(new_css_buff);
if (!new_jss_buff) {
XP_FREE(new_id);
return FALSE;
}
script_buff = new_jss_buff;
script_buff_len = new_jss_buff_len;
}
else {
/* unknown script type, punt */
XP_FREE(script_buff);
XP_FREE(new_id);
return FALSE;
}
/* not needed anymore */
XP_FREE(new_id);
stuff = (ETEvalStuff *) XP_NEW_ZAP(ETEvalStuff);
if (!stuff) {
/* what do we free here? */
XP_FREE(new_id);
return FALSE;
}
if (lo_CloneTagAndBlockLayout(context, state, tag)) {
tag->type = P_UNKNOWN;
stuff->len = XP_STRLEN(script_buff);
stuff->line_no = top_state->script_lineno;
stuff->scope_to = scope_to;
stuff->want_result = JS_FALSE;
stuff->data = context;
stuff->version = top_state->version;
stuff->principals = NULL;
ET_EvaluateScript(context, script_buff, stuff, lo_StyleEvalExitFn);
/* don't free scope_to, ET_EvaluateScript has taken possession */
XP_FREE(script_buff);
return TRUE;
}
XP_FREEIF(scope_to);
XP_FREE(script_buff);
return FALSE;
}
#ifdef DEBUG_ScriptPlugin
#include "np.h"
PA_Tag *
LO_CreateHiddenEmbedTag(PA_Tag *old_tag, char * newTagStr)
{
PA_Tag *new_tag = PA_CloneMDLTag(old_tag);
if(new_tag)
{
char * buf = NULL;
new_tag->type = P_EMBED;
XP_FREE(new_tag->data);
new_tag->data = NULL;
StrAllocCopy(buf,newTagStr);
XP_ASSERT(buf != NULL);
new_tag->data = (PA_Block)buf;
new_tag->data_len = XP_STRLEN((char*)new_tag->data);
XP_ASSERT(new_tag->data_len != 0);
}
return(new_tag);
}
/* Generate mimetype string corresponding to this script language.
Specifically, <SCRIPT language = blah> should yield a mimetype
of "script/blah"
*/
char * npl_Script2mimeType(MWContext *context, PA_Tag *tag)
{
PA_Block buff;
char * language;
char * preface = "script/";
uint32 prefLen = XP_STRLEN(preface);
char * mimebuf = NULL;
uint32 len;
buff = lo_FetchParamValue(context, tag, PARAM_LANGUAGE);
if (buff != NULL) {
PA_LOCK(language, char *, buff);
len = prefLen + XP_STRLEN(language);
mimebuf = XP_ALLOC(len+1);
if (mimebuf)
{
XP_STRCPY(mimebuf, preface);
XP_STRCAT(mimebuf, language);
}
PA_FREE(buff);
}
return mimebuf;
}
/* A plugin wants to handle this (otherwise unhandled) script language.
Now we redirect it to the plugin using the following steps:
1. Create a cachefile w/ the appropriate extension and store the contents of the script delims
2. Build a hidden, semi-internal embed tag pointing to the cachefile.
3. Cause Layout to initiate the hidden embed tag, which further starts netlib and other plugin
initialization.
*/
#define ALLOC_CHECK(a,id,abnormal_exit) {id++; if (!a) goto abnormal_exit;}
void npl_ScriptPlugin(MWContext *context, lo_DocState *state, PA_Tag *tag, size_t line_buf_len, char * mimebuf)
{
char * suffix = NULL;
char * fname = NULL;
char * embedtagstr = NULL;
char * NET_suffix = NULL;
PA_Tag * newTag = NULL;
NET_StreamClass* viewstream = NULL;
URL_Struct* urls = NULL;
int streamStatus = 0;
int id = 0;
if (!context || !state || !tag || (line_buf_len <= 0) || !mimebuf){
XP_Trace("npl_ScriptPlugin: Invalid input(s).");
return; /* no need to goto clean_exit, since havn't alloc'd anything */
}
urls = NET_CreateURLStruct("internal_url.", NET_DONT_RELOAD);
ALLOC_CHECK(urls,id,abnormal_exit);
/* NETLib gives me a pointer here instead of a copy of the string, so I have to make
my own, make checks, etc.
*/
NET_suffix = NET_cinfo_find_ext(mimebuf);
if (!NET_suffix)
goto abnormal_exit;
suffix = PR_smprintf("internal_url.%s", NET_suffix);
ALLOC_CHECK(suffix,id,abnormal_exit);
XP_FREEIF(urls->address);
StrAllocCopy(urls->address , suffix);
ALLOC_CHECK(urls->address,id,abnormal_exit);
XP_FREEIF(urls->content_name);
StrAllocCopy(urls->content_name, suffix);
ALLOC_CHECK(urls->content_name,id,abnormal_exit);
XP_FREEIF(urls->content_type);
StrAllocCopy(urls->content_type, mimebuf);
ALLOC_CHECK(urls->content_type,id,abnormal_exit);
urls->must_cache = 1; /* ugly flag for mailto and saveas */
viewstream = NET_StreamBuilder(FO_CACHE_ONLY, urls, context);
ALLOC_CHECK(viewstream,id,abnormal_exit);
streamStatus =
(*viewstream->put_block)(viewstream,(CONST char*)state->line_buf, line_buf_len);
if (streamStatus <= 0)
goto abnormal_exit;
(*viewstream->complete)(viewstream);
/* Now build internal embed tag pointing to this source: */
fname = WH_FileName(urls->cache_file, xpCache);
ALLOC_CHECK(fname,id,abnormal_exit);
embedtagstr = PR_smprintf("<EMBED SRC=file:///%s HIDDEN=TRUE>", fname);
ALLOC_CHECK(embedtagstr,id,abnormal_exit);
newTag = LO_CreateHiddenEmbedTag(tag,embedtagstr);
ALLOC_CHECK(newTag,id,abnormal_exit);
lo_FormatEmbed(context,state,newTag);
goto normal_exit;
abnormal_exit:
XP_Trace("npl_ScriptPlugin: Abnormal termination, id = %d",id);
if (urls) {
XP_FREEIF(urls->content_type);
XP_FREEIF(urls->content_name);
XP_FREEIF(urls->address);
XP_FREE( urls);
}
normal_exit:
XP_FREEIF(newTag);
XP_FREEIF(embedtagstr);
XP_FREEIF(fname);
XP_FREEIF(viewstream);
XP_FREEIF(suffix);
return;
}
#endif /* DEBUG_ScriptPlugin */
void
lo_ProcessScriptTag(MWContext *context, lo_DocState *state, PA_Tag *tag, JSObject *obj)
{
lo_TopState *top_state;
pa_DocData *doc_data;
XP_Bool type_explicitly_set=FALSE;
XP_Bool saw_archive=FALSE;
#ifdef DEBUG_ScriptPlugin
char * mimebuf = NULL;
#endif
top_state = state->top_state;
doc_data = (pa_DocData *)top_state->doc_data;
XP_ASSERT(doc_data != NULL || state->in_relayout || tag->lo_data);
if (tag->is_end == FALSE) {
PA_Block buff;
char *str, *url, *archiveSrc, *id, *codebase;
/* Controversial default language value. */
top_state->version = JSVERSION_DEFAULT;
if (tag->type == P_STYLE || tag->type == P_LINK) {
top_state->in_script = top_state->default_style_script_type;
}
else {
/* in order to get old script behaviour, pretend
* that the content-type is explicitly set for all scripts
*/
type_explicitly_set = TRUE;
top_state->in_script = SCRIPT_TYPE_MOCHA;
}
/* XXX account for HTML comment bytes and "lost" newlines */
if (lo_IsAnyCurrentAncestorSourced(state))
top_state->script_bytes = top_state->layout_bytes;
else
top_state->script_bytes = top_state->layout_bytes - tag->true_len;
if (tag->lo_data != NULL) {
top_state->script_bytes += (int32)tag->lo_data - 1;
tag->lo_data = NULL;
}
else if (doc_data != NULL) {
top_state->script_bytes += doc_data->comment_bytes;
}
else {
XP_ASSERT(state->in_relayout);
}
lo_ParseScriptLanguage(context, tag, &top_state->in_script,
&top_state->version);
#ifdef DEBUG_ScriptPlugin
if (top_state->in_script == SCRIPT_TYPE_UNKNOWN)
{
char* pluginName;
mimebuf = npl_Script2mimeType(context,tag);
if (mimebuf){
if ((pluginName = NPL_FindPluginEnabledForType(mimebuf)) != NULL){
top_state->in_script = SCRIPT_TYPE_PLUGIN;
XP_ASSERT(top_state->mimetype == NULL);
StrAllocCopy((char *)top_state->mimetype,mimebuf);
XP_FREE(mimebuf);
mimebuf = NULL;
}
else{
XP_FREE(mimebuf);
mimebuf = NULL;
}
}
}
#endif /* DEBUG_ScriptPlugin */
buff = lo_FetchParamValue(context, tag, PARAM_TYPE);
if (buff != NULL) {
PA_LOCK(str, char *, buff);
if ((XP_STRCASECMP(str, js_content_type) == 0) ||
(!XP_STRCASECMP(str, "text/javascript"))) {
if(tag->type == P_STYLE || tag->type == P_LINK)
{
top_state->in_script = SCRIPT_TYPE_JSSS;
top_state->default_style_script_type = SCRIPT_TYPE_JSSS;
}
else
{
top_state->in_script = SCRIPT_TYPE_MOCHA;
}
type_explicitly_set = TRUE;
}
else if ((XP_STRCASECMP(str, TEXT_CSS) == 0)) {
top_state->in_script = SCRIPT_TYPE_CSS;
top_state->default_style_script_type = SCRIPT_TYPE_CSS;
type_explicitly_set = TRUE;
}
else {
top_state->in_script = SCRIPT_TYPE_UNKNOWN;
top_state->default_style_script_type = SCRIPT_TYPE_UNKNOWN;
}
PA_UNLOCK(buff);
PA_FREE(buff);
}
/* check for media=screen
* don't load the style sheet if there
* is a media not equal to screen
*/
buff = lo_FetchParamValue(context, tag, PARAM_MEDIA);
if (buff) {
if (strcasecomp((char*)buff, "screen")) {
/* set the script type to UNKNOWN
* so that it will get thrown away
*/
top_state->in_script = SCRIPT_TYPE_UNKNOWN;
}
PA_FREE(buff);
}
/*
* Flush the line buffer so we can start storing Mocha script
* source lines in there.
*/
lo_FlushLineBuffer(context, state);
url = archiveSrc = id = codebase = NULL;
if (top_state->in_script != SCRIPT_TYPE_NOT) {
/*
* Check for the archive parameter for known languages.
*/
buff = lo_FetchParamValue(context, tag, PARAM_ARCHIVE);
if (buff != NULL) {
saw_archive = TRUE;
PA_LOCK(str, char *, buff);
url = NET_MakeAbsoluteURL(top_state->base_url, str);
PA_UNLOCK(buff);
PA_FREE(buff);
if (url == NULL) {
top_state->out_of_memory = TRUE;
return;
}
}
/*
* Look for ID attribute. If it's there we have may have
* an inline signed script.
*/
buff = lo_FetchParamValue(context, tag, PARAM_ID);
if (buff != NULL) {
PA_LOCK(str, char *, buff);
StrAllocCopy(id, str);
PA_UNLOCK(buff);
PA_FREE(buff);
if (id == NULL) {
top_state->out_of_memory = TRUE;
XP_FREEIF(url);
return;
}
}
/*
* Now look for a SRC="url" attribute for known languages.
* If found, synchronously load the url.
*/
buff = lo_FetchParamValue(context, tag, PARAM_SRC); /* XXX overloaded rv */
if (buff != NULL) {
XP_Bool allowFileSrc = FALSE;
char *absUrl;
PA_LOCK(str, char *, buff);
PREF_GetBoolPref(lo_jsAllowFileSrcFromNonFile, &allowFileSrc);
absUrl = NET_MakeAbsoluteURL(top_state->base_url, str);
if (absUrl == NULL) {
top_state->out_of_memory = TRUE;
XP_FREEIF(id);
} else if (allowFileSrc == FALSE &&
NET_URL_Type(absUrl) == FILE_TYPE_URL &&
NET_URL_Type(top_state->url) != FILE_TYPE_URL) {
/*
* Deny access from http: to file: via SCRIPT SRC=...
* XXX silently
*/
top_state->in_script = SCRIPT_TYPE_UNKNOWN;
XP_FREE(absUrl);
XP_FREEIF(url);
XP_FREEIF(id);
} else if (url != NULL) {
XP_FREE(absUrl);
StrAllocCopy(archiveSrc, str);
if (archiveSrc == NULL) {
top_state->out_of_memory = TRUE;
XP_FREE(url);
XP_FREEIF(id);
}
} else {
url = absUrl;
}
PA_UNLOCK(buff);
PA_FREE(buff);
if (top_state->out_of_memory)
return;
/*
* If we are doing a <script src=""> mocha script but JS
* is turned off just ignore the tag
*/
if (!LM_CanDoJS(context)) {
top_state->in_script = SCRIPT_TYPE_UNKNOWN;
XP_FREE(url);
XP_FREEIF(id);
XP_FREEIF(archiveSrc);
return;
}
}
}
/*
* Set text_divert so we know to accumulate text in line_buf
* without interpretation.
*/
state->text_divert = tag->type;
/*
* XXX need to stack these to handle blocked SCRIPT tags
*/
top_state->script_lineno = tag->newline_count + 1;
/* if we got here as a result of a LINK tag
* check to make sure rel=stylesheet and then
* check for an HREF and if one does not exist
* fail
*/
if (tag->type == P_LINK) {
char *cbuff = (char*)lo_FetchParamValue(context, tag, PARAM_REL);
if (cbuff && !strcasecomp(cbuff, "stylesheet")) {
XP_FREE(cbuff);
cbuff = (char*)lo_FetchParamValue(context, tag, PARAM_HREF);
if (cbuff) {
if (saw_archive && url) {
archiveSrc = XP_STRDUP(cbuff);
} else {
XP_FREEIF(url);
url = NET_MakeAbsoluteURL(top_state->base_url, cbuff);
}
}
}
XP_FREEIF(cbuff);
}
if (url != NULL || id != NULL || codebase != NULL) {
if ((doc_data != NULL) &&
(state->in_relayout == FALSE) &&
SCRIPT_EXEC_OK(top_state, state, tag->type, P_SCRIPT)) {
ScriptData *data;
data = XP_ALLOC(sizeof(ScriptData));
if (data == NULL) {
top_state->out_of_memory = TRUE;
return;
}
data->context = context;
data->state = state;
data->tag = PA_CloneMDLTag(tag);
if (data->tag == NULL) {
top_state->out_of_memory = TRUE;
XP_FREE(data);
return;
}
data->url = url;
data->archiveSrc = archiveSrc;
data->id = id;
if (codebase == NULL) {
StrAllocCopy(codebase, top_state->base_url);
}
data->codebase = codebase;
data->buffer = NULL;
data->bufferSize = 0;
data->version = top_state->version;
/*
* Only SCRIPT ARCHIVE= ID= without SRC= is an inline signed
* script -- if there is a SRC= attribute, archiveSrc will be
* non-null.
*/
data->inlineSigned = (JSBool)
(url != NULL && archiveSrc == NULL && id != NULL);
/* Reset version accumulator */
top_state->version = JSVERSION_UNKNOWN;
XP_ASSERT (tag->type == P_SCRIPT || tag->type == P_STYLE ||
tag->type == P_LINK);
/*
* Out-of-line included (by src=) or inline signed script.
* Save continuatation data on top_state. If it's signed,
* we'll verify the signature once we see </script> and
* have the inline script to verify.
*/
top_state->scriptData = data;
}
else {
XP_FREE(url);
XP_FREEIF(id);
XP_FREEIF(archiveSrc);
}
}
}
else {
/*
* We are in the </script> tag now...
*/
size_t line_buf_len;
intn script_type;
char *scope_to=NULL;
char *untransformed = NULL;
script_type = top_state->in_script;
top_state->in_script = SCRIPT_TYPE_NOT;
/* guard against superfluous end tags */
if (script_type == SCRIPT_TYPE_NOT)
goto end_tag_out;
/* convert from CSS to JavaScript here */
if (tag->type != P_LINK && script_type == SCRIPT_TYPE_CSS) {
char *new_buffer;
int32 new_buffer_length;
CSS_ConvertToJS((char *)state->line_buf,
state->line_buf_len,
&new_buffer,
&new_buffer_length);
if (!new_buffer) {
/* css translator error, unblock layout and return */
state->text_divert = P_UNKNOWN;
state->line_buf_len = 0; /* clear script text */
goto end_tag_out;
}
untransformed = (char *) state->line_buf;
state->line_buf = (PA_Block) new_buffer;
state->line_buf_len = new_buffer_length;
state->line_buf_size = new_buffer_length;
if (state->line_buf_len)
state->line_buf_len--; /* hack: subtract one to remove final \n */
script_type = SCRIPT_TYPE_JSSS;
}
if (tag->type == P_STYLE) {
/* mocha scoped to document == jsss */
scope_to = "document";
}
/*
* Reset these before potentially recursing indirectly through
* the document.write() built-in function, which writes to the
* very same doc_data->parser_stream that this <SCRIPT> tag
* came in on.
*/
state->text_divert = P_UNKNOWN;
line_buf_len = state->line_buf_len;
state->line_buf_len = 0;
if (script_type != SCRIPT_TYPE_UNKNOWN &&
script_type != SCRIPT_TYPE_NOT) {
/*
* If mocha is disabled or can't be done in this context we
* are going to just ignore the buffer contents
*/
if (!LM_CanDoJS(context)) {
top_state->in_script = SCRIPT_TYPE_UNKNOWN;
goto end_tag_out;
}
if ((doc_data != NULL) &&
(state->in_relayout == FALSE) &&
SCRIPT_EXEC_OK(top_state, state, tag->type, P_SCRIPT)) {
/*
* First off, make sure layout is blocking on us
*/
if (lo_create_script_blockage(context, state,
tag->type == P_SCRIPT ? LO_SCRIPT : LO_UNKNOWN))
{
ScriptData *data;
/*
* Extreme hackery. Hideous and shameful. See the comment
* in lo_BlockScriptTag before similar is_end/overflow code
* and commence vomiting.
*/
lo_BlockScriptTag(context, state, NULL);
if (tag->is_end == (PRPackedBool)1) {
PA_PushOverflow(doc_data);
doc_data->overflow_depth ++;
}
/*
* Set the document.write tag insertion point.
*/
top_state->input_write_point[top_state->input_write_level] = &top_state->tags;
data = top_state->scriptData;
top_state->scriptData = NULL;
if (data && data->url) {
/*
* Three cases:
* 1. SCRIPT SRC=: url non-null
* 2. SCRIPT ARCHIVE= SRC=: url, archiveSrc non-null
* 3. SCRIPT ARCHIVE= ID=: url, id non-null
* In the last case, we copy the inline script into
* data's buffer and let lo_script_archive_exit_fn do
* the eval. We use an inlineSigned flag to avoid a
* bunch of (url != NULL && archiveSrc == NULL && id
* != NULL) tests.
*/
if (data->inlineSigned) {
StrAllocCopy(data->buffer, (char *) state->line_buf);
data->bufferSize = line_buf_len;
}
lo_GetScriptFromURL(data, script_type);
}
else {
JSPrincipals *principals = NULL;
ETEvalStuff * stuff;
if (data) {
principals = LM_NewJSPrincipals(NULL, data->id,
data->codebase);
if (untransformed &&
!LM_SetUntransformedSource(principals,
untransformed,
(char *) state->line_buf))
{
top_state->out_of_memory = TRUE;
}
lo_DestroyScriptData(data);
}
/*
* send the buffer off to be evaluated
*/
#ifdef DEBUG_ScriptPlugin
if (script_type == SCRIPT_TYPE_PLUGIN)
{
XP_ASSERT(mimebuf == NULL);
npl_ScriptPlugin(context, state, tag, line_buf_len,top_state->mimetype);
lo_unblock_script_tag(context, TRUE);
}
else
#endif /* DEBUG_ScriptPlugin */
stuff = (ETEvalStuff *) XP_NEW_ZAP(ETEvalStuff);
if (!stuff)
goto end_tag_out;
stuff->len = line_buf_len;
stuff->line_no = top_state->script_lineno;
if (scope_to)
stuff->scope_to = XP_STRDUP(scope_to);
else
stuff->scope_to = NULL;
stuff->want_result = JS_FALSE;
stuff->data = context;
stuff->version = top_state->version;
stuff->principals = principals;
ET_EvaluateScript(context,
(char *) state->line_buf,
stuff,
lo_ScriptEvalExitFn);
}
/* Reset version accumulator */
top_state->version = JSVERSION_UNKNOWN;
}
}
}
end_tag_out:
/*
* If we got a </SCRIPT> and still have scriptData set here, it must
* be left over from an error case above, so we free it.
*/
if (top_state->scriptData) {
XP_ASSERT(!top_state->layout_blocking_element);
lo_DestroyScriptData(top_state->scriptData);
top_state->scriptData = NULL;
}
XP_FREEIF(untransformed);
}
}
static char script_reblock_tag[] = "<" PT_NSCP_REBLOCK ">";
/*
* Create a tag that will reblock us
*/
void
LO_CreateReblockTag(MWContext * context, LO_Element * current_script)
{
lo_TopState *top_state;
pa_DocData *doc_data;
PA_Tag * tag/*, ** tag_ptr*/;
top_state = lo_FetchTopState(XP_DOCID(context));
doc_data = (pa_DocData *)top_state->doc_data;
tag = pa_CreateMDLTag(doc_data,
script_reblock_tag,
sizeof script_reblock_tag - 1);
if (tag == NULL)
return;
tag->lo_data = current_script;
/*
* Kludge in the write level for sanity check in lo_LayoutTag.
*/
tag->newline_count = (uint16)top_state->input_write_level;
/*
* Add the reblock tag to the tags list but don't advance the write_point
* in case we just wrote a nested script that also writes: the inner
* script must insert before the outer reblock tag, but after all the
* earlier tags.
*/
/* tag_ptr = top_state->input_write_point; */
lo_BlockTag(context, NULL, tag);
/* top_state->input_write_point = tag_ptr; */
}
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