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  • Running in to some issues with Tumblr's Theme Parser

    - by Kylee
    Below part of a tumblr theme I'm working on and you will notice that I use the {block:PostType} syntax to declare the opening tag of each post, which is a <li> element in an Ordered List. This allows me to not only dynamicly set the li's class based on the type of post but cuts down on the number of times I'm calling the ShareThis JS which was really bogging down the page. This creates a new issue though which I believe is a flaw in Tumblr's parser. Each post is an ordered list with one <li> element in it. I know I could solve this by having each post as a <div> but I really like the control and semantics of using a list. Tumblr gurus? Suggestions? Sample of code: {block:Posts} <ol class="posts"> {block:Text} <li class="post type_text" id="{PostID}"> {block:Title} <h2><a href="{Permalink}" title="Go to post '{Title}'.">{Title}</a></h2> {/block:Title} {Body} {/block:Text} {block:Photo} <li class="post type_photo" id="{PostID}"> <div class="image"> <a href="{LinkURL}"><img src="{PhotoURL-500}" alt="{PhotoAlt}"></a> </div> {block:Caption} {Caption} {/block:Caption} {/block:Photo} {block:Photoset} <li class="post type_photoset" id="{PostID}"> {Photoset-500} {block:Caption} {Caption} {/block:Caption} {/block:Photoset} {block:Quote} <li class="post type_quote" id="{PostID}"> <blockquote> <div class="quote_symbol">&ldquo;</div> {Quote} </blockquote> {block:Source} <div class="quote_source">{Source}</div> {/block:Source} {/block:Quote} {block:Link} <li class="post type_link" id="{PostID}"> <h2><a href="{URL}" {Target} title="Go to {Name}.">{Name}</a></h2> {block:Description} {Description} {/block:Description} {/block:Link} {block:Chat} <li class="post type_chat" id="{PostID}"> {block:Title} <h2><a href="{Permalink}" title="Go to post {PostID} '{Title}'.">{Title}</a></h2> {/block:Title} <table class="chat_log"> {block:Lines} <tr class="{Alt} user_{UserNumber}"> <td class="person">{block:Label}{Label}{/block:Label}</td> <td class="message">{Line}</td> </tr> {/block:Lines} </table> {/block:Chat} {block:Video} <li class="post type_video" id="{PostID}"> {Video-500} {block:Caption} {Caption} {/block:Caption} {/block:Video} {block:Audio} <li class="post type_audio" id="{PostID}"> {AudioPlayerWhite} {block:Caption} {Caption} {/block:Caption} {block:ExternalAudio} <p><a href="{ExternalAudioURL}" title="Download '{ExternalAudioURL}'">Download</a></p> {/block:ExternalAudio} {/block:Audio} <div class="post_footer"> <p class="post_date">Posted on {ShortMonth} {DayOfMonth}, {Year} at {12hour}:{Minutes} {AmPm}</p> <ul> <li><a class="comment_link" href="{Permalink}#disqus_thread">Comments</a></li> <li><script type="text/javascript" src="http://w.sharethis.com/button/sharethis.js#publisher=722e181d-1d8a-4363-9ebe-82d5263aea94&amp;type=website"></script></li> </ul> {block:PermalinkPage} <div id="disqus_thread"></div> <script type="text/javascript" src="http://disqus.com/forums/kyleetilley/embed.js"></script> <noscript><a href="http://disqus.com/forums/kyleetilley/?url=ref">View the discussion thread.</a></noscript> {/block:PermalinkPage} </div> </li> </ol> {/block:Posts}

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  • JSON Formatting with Jersey, Jackson, & json.org/java Parser using Curl Command

    - by socal_javaguy
    Using Java 6, Tomcat 7, Jersey 1.15, Jackson 2.0.6 (from FasterXml maven repo), & www.json.org parser, I am trying to pretty print the JSON String so it will look indented by the curl -X GET command line. I created a simple web service which has the following architecture: My POJOs (model classes): Family.java import javax.xml.bind.annotation.XmlRootElement; @XmlRootElement public class Family { private String father; private String mother; private List<Children> children; // Getter & Setters } Children.java import javax.xml.bind.annotation.XmlRootElement; @XmlRootElement public class Children { private String name; private String age; private String gender; // Getters & Setters } Using a Utility Class, I decided to hard code the POJOs as follows: public class FamilyUtil { public static Family getFamily() { Family family = new Family(); family.setFather("Joe"); family.setMother("Jennifer"); Children child = new Children(); child.setName("Jimmy"); child.setAge("12"); child.setGender("male"); List<Children> children = new ArrayList<Children>(); children.add(child); family.setChildren(children); return family; } } My web service: import java.io.IOException; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; import org.codehaus.jackson.JsonGenerationException; import org.codehaus.jackson.map.JsonMappingException; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jettison.json.JSONException; import org.json.JSONObject; import org.json.JSONTokener; import com.myapp.controller.myappController; import com.myapp.resource.output.HostingSegmentOutput; import com.myapp.util.FamilyUtil; @Path("") public class MyWebService { @GET @Produces(MediaType.APPLICATION_JSON) public static String getFamily() throws IOException, JsonGenerationException, JsonMappingException, JSONException, org.json.JSONException { ObjectMapper mapper = new ObjectMapper(); String uglyJsonString = mapper.writeValueAsString(FamilyUtil.getFamily()); System.out.println(uglyJsonString); JSONTokener tokener = new JSONTokener(uglyJsonString); JSONObject finalResult = new JSONObject(tokener); return finalResult.toString(4); } } When I run this using: curl -X GET http://localhost:8080/mywebservice I get this in my Eclipse's console: {"father":"Joe","mother":"Jennifer","children":[{"name":"Jimmy","age":"12","gender":"male"}]} But from the curl command on the command line (this response is more important): "{\n \"mother\": \"Jennifer\",\n \"children\": [{\n \"age\": \"12\",\n \"name\": \"Jimmy\",\n \"gender\": \"male\"\n }],\n \"father\": \"Joe\"\n}" This is adding newline escape sequences and placing double quotes (but not indenting like it should it does have 4 spaces after the new line but its all in one line). Would appreciate it if someone could point me in the right direction.

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  • BB Code Parser (in formatting phase) with jQuery jammed due to messed up loops most likely

    - by Oskar
    Greetings everyone, I'm making a BB Code Parser but I'm stuck on the JavaScript front. I'm using jQuery and the caret library for noting selections in a text field. When someone selects a piece of text a div with formatting options will appear. I have two issues. Issue 1. How can I make this work for multiple textfields? I'm drawing a blank as it currently will detect the textfield correctly until it enters the $("#BBtoolBox a").mousedown(function() { } loop. After entering it will start listing one field after another in a random pattern in my eyes. !!! MAIN Issue 2. I'm guessing this is the main reason for issue 1 as well. When I press a formatting option it will work on the first action but not the ones afterwards. It keeps duplicating the variable parsed. (if I only keep to one field it will never print in the second) Issue 3 If you find anything especially ugly in the code, please tell me how to improve myself. I appriciate all help I can get. Thanks in advance $(document).ready(function() { BBCP(); }); function BBCP(el) { if(!el) { el = "textarea"; } // Stores the cursor position of selection start $(el).mousedown(function(e) { coordX = e.pageX; coordY = e.pageY; // Event of selection finish by using keyboard }).keyup(function() { BBtoolBox(this, coordX, coordY); // Event of selection finish by using mouse }).mouseup(function() { BBtoolBox(this, coordX, coordY); // Event of field unfocus }).blur(function() { $("#BBtoolBox").hide(); }); } function BBtoolBox(el, coordX, coordY) { // Variable containing the selected text by Caret selection = $(el).caret().text; // Ignore the request if no text is selected if(selection.length == 0) { $("#BBtoolBox").hide(); return; } // Print the toolbox if(!document.getElementById("BBtoolBox")) { $(el).before("<div id=\"BBtoolBox\" style=\"left: "+ ( coordX + 5 ) +"px; top: "+ ( coordY - 30 ) +"px;\"></div>"); // List of actions $("#BBtoolBox").append("<a href=\"#\" onclick=\"return false\"><img src=\"./icons/text_bold.png\" alt=\"B\" title=\"Bold\" /></a>"); $("#BBtoolBox").append("<a href=\"#\" onclick=\"return false\"><img src=\"./icons/text_italic.png\" alt=\"I\" title=\"Italic\" /></a>"); } else { $("#BBtoolBox").css({'left': (coordX + 3) +'px', 'top': (coordY - 30) +'px'}).show(); } // Parse the text according to the action requsted $("#BBtoolBox a").mousedown(function() { switch($(this).children(":first").attr("alt")) { case "B": // bold parsed = "[b]"+ selection +"[/b]"; break; case "I": // italic parsed = "[i]"+ selection +"[/i]"; break; } // Changes the field value by replacing the selection with the variable parsed $(el).val($(el).caret().replace(parsed)); $("#BBtoolBox").hide(); return false; }); }

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  • Why is UITableView not reloading (even on the main thread)?

    - by radesix
    I have two programs that basically do the same thing. They read an XML feed and parse the elements. The design of both programs is to use an asynchronous NSURLConnection to get the data then to spawn a new thread to handle the parsing. As batches of 5 items are parsed it calls back to the main thread to reload the UITableView. My issue is it works fine in one program, but not the other. I know that the parsing is actually occuring on the background thread and I know that [tableView reloadData] is executing on the main thread; however, it doesn't reload the table until all parsing is complete. I'm stumped. As far as I can tell... both programs are structured exactly the same way. Here is some code from the app that isn't working correctly. - (void)startConnectionWithURL:(NSString *)feedURL feedList:(NSMutableArray *)list { self.feedList = list; // Use NSURLConnection to asynchronously download the data. This means the main thread will not be blocked - the // application will remain responsive to the user. // // IMPORTANT! The main thread of the application should never be blocked! Also, avoid synchronous network access on any thread. // NSURLRequest *feedURLRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:feedURL]]; self.bloggerFeedConnection = [[[NSURLConnection alloc] initWithRequest:feedURLRequest delegate:self] autorelease]; // Test the validity of the connection object. The most likely reason for the connection object to be nil is a malformed // URL, which is a programmatic error easily detected during development. If the URL is more dynamic, then you should // implement a more flexible validation technique, and be able to both recover from errors and communicate problems // to the user in an unobtrusive manner. NSAssert(self.bloggerFeedConnection != nil, @"Failure to create URL connection."); // Start the status bar network activity indicator. We'll turn it off when the connection finishes or experiences an error. [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { self.bloggerData = [NSMutableData data]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [bloggerData appendData:data]; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { self.bloggerFeedConnection = nil; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; // Spawn a thread to fetch the link data so that the UI is not blocked while the application parses the XML data. // // IMPORTANT! - Don't access UIKit objects on secondary threads. // [NSThread detachNewThreadSelector:@selector(parseFeedData:) toTarget:self withObject:bloggerData]; // farkData will be retained by the thread until parseFarkData: has finished executing, so we no longer need // a reference to it in the main thread. self.bloggerData = nil; } If you read this from the top down you can see when the NSURLConnection is finished I detach a new thread and call parseFeedData. - (void)parseFeedData:(NSData *)data { // You must create a autorelease pool for all secondary threads. NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; self.currentParseBatch = [NSMutableArray array]; self.currentParsedCharacterData = [NSMutableString string]; self.feedList = [NSMutableArray array]; // // It's also possible to have NSXMLParser download the data, by passing it a URL, but this is not desirable // because it gives less control over the network, particularly in responding to connection errors. // NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data]; [parser setDelegate:self]; [parser parse]; // depending on the total number of links parsed, the last batch might not have been a "full" batch, and thus // not been part of the regular batch transfer. So, we check the count of the array and, if necessary, send it to the main thread. if ([self.currentParseBatch count] > 0) { [self performSelectorOnMainThread:@selector(addLinksToList:) withObject:self.currentParseBatch waitUntilDone:NO]; } self.currentParseBatch = nil; self.currentParsedCharacterData = nil; [parser release]; [pool release]; } In the did end element delegate I check to see that 5 items have been parsed before calling the main thread to perform the update. - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:kItemElementName]) { [self.currentParseBatch addObject:self.currentItem]; parsedItemsCounter++; if (parsedItemsCounter % kSizeOfItemBatch == 0) { [self performSelectorOnMainThread:@selector(addLinksToList:) withObject:self.currentParseBatch waitUntilDone:NO]; self.currentParseBatch = [NSMutableArray array]; } } // Stop accumulating parsed character data. We won't start again until specific elements begin. accumulatingParsedCharacterData = NO; } - (void)addLinksToList:(NSMutableArray *)links { [self.feedList addObjectsFromArray:links]; // The table needs to be reloaded to reflect the new content of the list. if (self.viewDelegate != nil && [self.viewDelegate respondsToSelector:@selector(parser:didParseBatch:)]) { [self.viewDelegate parser:self didParseBatch:links]; } } Finally, the UIViewController delegate: - (void)parser:(XMLFeedParser *)parser didParseBatch:(NSMutableArray *)parsedBatch { NSLog(@"parser:didParseBatch:"); [self.selectedBlogger.feedList addObjectsFromArray:parsedBatch]; [self.tableView reloadData]; } If I write to the log when my view controller delegate fires to reload the table and when cellForRowAtIndexPath fires as it's rebuilding the table then the log looks something like this: parser:didParseBatch: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: parser:didParseBatch: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: parser:didParseBatch: parser:didParseBatch: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath Clearly, the tableView is not reloading when I tell it to every time. The log from the app that works correctly looks like this: parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath parser:didParseBatch: tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath tableView:cellForRowAtIndexPath

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  • Array Conversion in Xstream Parser

    - by Avidev9
    Hi am trying to convert the following xml into object using Xstream parser. I tried using the below code to convert the xml but am getting Duplicate field ERRORS ---- Debugging information ---- field : ERRORS class : com.avidev9.Fees.GCSFeesResponse$DebitsWSDS required-type : com.avidev9.Fees.GCSFeesResponse$DebitsWSDS converter-type : com.thoughtworks.xstream.converters.reflection.ReflectionConverter path : /DebitsWSDS/ERRORS[2] line number : 1 version : null The Code I used xstream.alias("DebitsWSDS", GCSFeesResponse.DebitsWSDS.class); xstream.alias("ERRORS", GCSFeesResponse.ERRORS.class); xstream.alias("ERROR_ID", String.class); xstream.alias("TABLE_NAME", String.class); xstream.alias("TABLE_ID", String.class); xstream.alias("ROW_ID", String.class); xstream.alias("ERROR_TEXT", String.class); xstream.alias("ERROR_CODE", String.class); xstream.alias("COLUMN_ID", String.class); xstream.alias("ERROR_TYPE", String.class); GCSFeesResponse.DebitsWSDS gcsFeesResponse =(GCSFeesResponse.DebitsWSDS)xstream.fromXML(result.get_any()[0].getAsString()); XML <DebitsWSDS xmlns=""> <DEBITS> <DEBIT_ID>-1</DEBIT_ID> <ACCOUNT_ID>12321312313</ACCOUNT_ID> <EFFECTIVE_DATE>2012-12-12T00:00:00-06:00</EFFECTIVE_DATE> <DAY_OF_MONTH>12</DAY_OF_MONTH> <DEBIT_TYPE>S</DEBIT_TYPE> <OCCURS_NUM>1</OCCURS_NUM> <DEBIT_AMOUNT>750</DEBIT_AMOUNT> <MEMO>S</MEMO> <ACTIVE_FLAG>Y</ACTIVE_FLAG> <MODIFIED_BY/> <DEBIT_AUTHORIZED/> <DEBIT_AUTHORIZED_BY/> <REMAINING_OCCURRENCES>0</REMAINING_OCCURRENCES> </DEBITS> <ERRORS> <ERROR_ID>1</ERROR_ID> <TABLE_NAME>Debits</TABLE_NAME> <TABLE_ID>-1</TABLE_ID> <ROW_ID>0</ROW_ID> <COLUMN_ID>EXCEPTION</COLUMN_ID> <ERROR_TYPE>E</ERROR_TYPE> <ERROR_CODE>4</ERROR_CODE> <ERROR_TEXT>This debit type is not allowed for this company and policy group</ERROR_TEXT> </ERRORS> <ERRORS> <ERROR_ID>2</ERROR_ID> <TABLE_NAME>Clients</TABLE_NAME> <TABLE_ID/> <ROW_ID>0</ROW_ID> <COLUMN_ID>CLOSE_SCHED_DATE</COLUMN_ID> <ERROR_TYPE>E</ERROR_TYPE> <ERROR_CODE>4</ERROR_CODE> <ERROR_TEXT>Client has been closed. Cannot Authorize Draft.</ERROR_TEXT> </ERRORS> <ERRORS> <ERROR_ID>3</ERROR_ID> <TABLE_NAME>Debits</TABLE_NAME> <TABLE_ID>-1</TABLE_ID> <ROW_ID>0</ROW_ID> <COLUMN_ID>EXCEPTION</COLUMN_ID> <ERROR_TYPE>E</ERROR_TYPE> <ERROR_CODE>4</ERROR_CODE> <ERROR_TEXT>Cannot Schedule a Debit or Draft. Client has been closed.</ERROR_TEXT> </ERRORS> <ERRORS> <ERROR_ID>1</ERROR_ID> <TABLE_NAME>Debits</TABLE_NAME> <TABLE_ID>-1</TABLE_ID> <ROW_ID>0</ROW_ID> <COLUMN_ID>ACTIVE_FLAG</COLUMN_ID> <ERROR_TYPE>W</ERROR_TYPE> <ERROR_CODE>4</ERROR_CODE> <ERROR_TEXT>Creating debit on inactive Client account.</ERROR_TEXT> </ERRORS> </DebitsWSDS> My class structure. package com.avidev9.Fees; import java.util.List; public class GCSFeesResponse { public DebitsWSDS DebitsWSDS; public class DebitsWSDS { public List<ERRORS> ERRORS; public String xmlns; public DEBITS DEBITS; } public class ERRORS { public String TABLE_NAME; public Integer TABLE_ID; public Integer ERROR_ID; public Integer ROW_ID; public String ERROR_TEXT; public Integer ERROR_CODE; public String COLUMN_ID; public String ERROR_TYPE; } public class DEBITS { public String EFFECTIVE_DATE; public String ACTIVE_FLAG; public Long ACCOUNT_ID; public String DEBIT_AUTHORIZED_BY; public Integer DAY_OF_MONTH; public Integer DEBIT_ID; public String MEMO; public Integer REMAINING_OCCURRENCES; public String DEBIT_TYPE; public Integer OCCURS_NUM; public Integer DEBIT_AMOUNT; public String DEBIT_AUTHORIZED; public String MODIFIED_BY; } }

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  • How to prevent ‘Select *’ : The elegant way

    - by Dave Ballantyne
    I’ve been doing a lot of work with the “Microsoft SQL Server 2012 Transact-SQL Language Service” recently, see my post here and article here for more details on its use and some uses. An obvious use is to interrogate sql scripts to enforce our coding standards.  In the SQL world a no-brainer is SELECT *,  all apologies must now be given to Jorge Segarra and his post “How To Prevent SELECT * The Evil Way” as this is a blatant rip-off IMO, the only true way to check for this particular evilness is to parse the SQL as if we were SQL Server itself.  The parser mentioned above is ,pretty much, the best tool for doing this.  So without further ado lets have a look at a powershell script that does exactly that : cls #Load the assembly [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SqlServer.Management.SqlParser") | Out-Null $ParseOptions = New-Object Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions $ParseOptions.BatchSeparator = 'GO' #Create the object $Parser = new-object Microsoft.SqlServer.Management.SqlParser.Parser.Scanner($ParseOptions) $SqlArr = Get-Content "C:\scripts\myscript.sql" $Sql = "" foreach($Line in $SqlArr){ $Sql+=$Line $Sql+="`r`n" } $Parser.SetSource($Sql,0) $Token=[Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::TOKEN_SET $IsEndOfBatch = $false $IsMatched = $false $IsExecAutoParamHelp = $false $Batch = "" $BatchStart =0 $Start=0 $End=0 $State=0 $SelectColumns=@(); $InSelect = $false $InWith = $false; while(($Token = $Parser.GetNext([ref]$State ,[ref]$Start, [ref]$End, [ref]$IsMatched, [ref]$IsExecAutoParamHelp ))-ne [Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::EOF) { $Str = $Sql.Substring($Start,($End-$Start)+1) try{ ($TokenPrs =[Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]$Token) | Out-Null #Write-Host $TokenPrs if($TokenPrs -eq [Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::TOKEN_SELECT){ $InSelect =$true $SelectColumns+="" } if($TokenPrs -eq [Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::TOKEN_FROM){ $InSelect =$false #Write-Host $SelectColumns -BackgroundColor Red foreach($Col in $SelectColumns){ if($Col.EndsWith("*")){ Write-Host "select * is not allowed" exit } } $SelectColumns =@() } }catch{ #$Error $TokenPrs = $null } if($InSelect -and $TokenPrs -ne [Microsoft.SqlServer.Management.SqlParser.Parser.Tokens]::TOKEN_SELECT){ if($Str -eq ","){ $SelectColumns+="" }else{ $SelectColumns[$SelectColumns.Length-1]+=$Str } } } OK, im not going to pretend that its the prettiest of powershell scripts,  but if our parsed script file “C:\Scripts\MyScript.SQL” contains SELECT * then “select * is not allowed” will be written to the host.  So, where can this go wrong ?  It cant ,or at least shouldn’t , go wrong, but it is lacking in functionality.  IMO, Select * should be allowed in CTEs, views and Inline table valued functions at least and as it stands they will be reported upon. Anyway, it is a start and is more reliable that other methods.

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  • Boost Spirit and Lex parser problem

    - by bpw1621
    I've been struggling to try and (incrementally) modify example code from the documentation but with not much different I am not getting the behavior I expect. Specifically, the "if" statement fails when (my intent is that) it should be passing (there was an "else" but that part of the parser was removed during debugging). The assignment statement works fine. I had a "while" statement as well which had the same problem as the "if" statement so I am sure if I can get help to figure out why one is not working it should be easy to get the other going. It must be kind of subtle because this is almost verbatim what is in one of the examples. #include <iostream> #include <fstream> #include <string> #define BOOST_SPIRIT_DEBUG #include <boost/config/warning_disable.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/lex_lexertl.hpp> #include <boost/spirit/include/phoenix_operator.hpp> #include <boost/spirit/include/phoenix_statement.hpp> #include <boost/spirit/include/phoenix_container.hpp> namespace qi = boost::spirit::qi; namespace lex = boost::spirit::lex; inline std::string read_from_file( const char* infile ) { std::ifstream instream( infile ); if( !instream.is_open() ) { std::cerr << "Could not open file: \"" << infile << "\"" << std::endl; exit( -1 ); } instream.unsetf( std::ios::skipws ); return( std::string( std::istreambuf_iterator< char >( instream.rdbuf() ), std::istreambuf_iterator< char >() ) ); } template< typename Lexer > struct LangLexer : lex::lexer< Lexer > { LangLexer() { identifier = "[a-zA-Z][a-zA-Z0-9_]*"; number = "[-+]?(\\d*\\.)?\\d+([eE][-+]?\\d+)?"; if_ = "if"; else_ = "else"; this->self = lex::token_def<> ( '(' ) | ')' | '{' | '}' | '=' | ';'; this->self += identifier | number | if_ | else_; this->self( "WS" ) = lex::token_def<>( "[ \\t\\n]+" ); } lex::token_def<> if_, else_; lex::token_def< std::string > identifier; lex::token_def< double > number; }; template< typename Iterator, typename Lexer > struct LangGrammar : qi::grammar< Iterator, qi::in_state_skipper< Lexer > > { template< typename TokenDef > LangGrammar( const TokenDef& tok ) : LangGrammar::base_type( program ) { using boost::phoenix::val; using boost::phoenix::ref; using boost::phoenix::size; program = +block; block = '{' >> *statement >> '}'; statement = assignment | if_stmt; assignment = ( tok.identifier >> '=' >> expression >> ';' ); if_stmt = ( tok.if_ >> '(' >> expression >> ')' >> block ); expression = ( tok.identifier[ qi::_val = qi::_1 ] | tok.number[ qi::_val = qi::_1 ] ); BOOST_SPIRIT_DEBUG_NODE( program ); BOOST_SPIRIT_DEBUG_NODE( block ); BOOST_SPIRIT_DEBUG_NODE( statement ); BOOST_SPIRIT_DEBUG_NODE( assignment ); BOOST_SPIRIT_DEBUG_NODE( if_stmt ); BOOST_SPIRIT_DEBUG_NODE( expression ); } qi::rule< Iterator, qi::in_state_skipper< Lexer > > program, block, statement; qi::rule< Iterator, qi::in_state_skipper< Lexer > > assignment, if_stmt; typedef boost::variant< double, std::string > expression_type; qi::rule< Iterator, expression_type(), qi::in_state_skipper< Lexer > > expression; }; int main( int argc, char** argv ) { typedef std::string::iterator base_iterator_type; typedef lex::lexertl::token< base_iterator_type, boost::mpl::vector< double, std::string > > token_type; typedef lex::lexertl::lexer< token_type > lexer_type; typedef LangLexer< lexer_type > LangLexer; typedef LangLexer::iterator_type iterator_type; typedef LangGrammar< iterator_type, LangLexer::lexer_def > LangGrammar; LangLexer lexer; LangGrammar grammar( lexer ); std::string str( read_from_file( 1 == argc ? "boostLexTest.dat" : argv[1] ) ); base_iterator_type strBegin = str.begin(); iterator_type tokenItor = lexer.begin( strBegin, str.end() ); iterator_type tokenItorEnd = lexer.end(); std::cout << std::setfill( '*' ) << std::setw(20) << '*' << std::endl << str << std::endl << std::setfill( '*' ) << std::setw(20) << '*' << std::endl; bool result = qi::phrase_parse( tokenItor, tokenItorEnd, grammar, qi::in_state( "WS" )[ lexer.self ] ); if( result ) { std::cout << "Parsing successful" << std::endl; } else { std::cout << "Parsing error" << std::endl; } return( 0 ); } Here is the output of running this (the file read into the string is dumped out first in main) ******************** { a = 5; if( a ){ b = 2; } } ******************** <program> <try>{</try> <block> <try>{</try> <statement> <try></try> <assignment> <try></try> <expression> <try></try> <success>;</success> <attributes>(5)</attributes> </expression> <success></success> <attributes>()</attributes> </assignment> <success></success> <attributes>()</attributes> </statement> <statement> <try></try> <assignment> <try></try> <fail/> </assignment> <if_stmt> <try> if(</try> <fail/> </if_stmt> <fail/> </statement> <fail/> </block> <fail/> </program> Parsing error

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  • Trouble parsing some RSS feeds using Java and Sax

    - by brockoli
    I've written an RSS feed parser in Java (running on Android) and it parses some feeds perfectly, and others not at all. I get the following error when it tries to parse Slashdot (http://rss.slashdot.org/Slashdot/slashdot) org.apache.harmony.xml.ExpatParser$ParseException: At line 1, column 0: unbound prefix If I try to parse Wired (http://feeds.wired.com/wired/index) org.apache.harmony.xml.ExpatParser$ParseException: At line 1, column 0: syntax error If I try to parse AndroidGuys (http://feeds.feedburner.com/androidguyscom) org.apache.harmony.xml.ExpatParser$ParseException: At line 1, column 0: syntax error Here is some code for my parser. public void updateArticles(Context ctx, Feed feed, int numDaysToGet) { try { targetFlag = TARGET_ARTICLES; tweetDB = new TweetMonsterDBAdapter(ctx); tweetDB.open(); currentFeed = feed; TimeZone.setDefault(TimeZone.getTimeZone("UTC")); // or "Etc/GMT-1" Date currentDate = new Date(); long dateInMillis = currentDate.getTime(); oldestDate.setTime(dateInMillis-(dayInMillis*numDaysToGet)); SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser(); XMLReader xr = sp.getXMLReader(); xr.setContentHandler(this); xr.parse(new InputSource(currentFeed.url.openStream())); } catch (IOException e) { Log.e("TweetMonster", e.toString()); } catch (SAXException e) { tweetDB.close(); Log.e("TweetMonster", e.toString()); } catch (ParserConfigurationException e) { Log.e("TweetMonster", e.toString()); } tweetDB.close(); } It doesn't even get into my startElement method.

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  • Existing parsers in c# (BSD license or similar)

    - by Sylverdrag
    I am looking for parsers (in C#) for a bunch of formats. (PHP, ASP, some XML based formats, HTML,...pretty much anything I can get my hands on.) The purpose is to separate the text from the code and do some edits without messing up the code. I had a look at ANTLR, but while it seems like the "right tool", there is just too much prior knowledge assumed. I have an easier time writing a parser from scratch than understanding how to "easily" generate parsers from ANTLR. (I wrote a small parser for a specific type of RTF files within a couple days, so the task is probably within my reach, but as I have no formal knowledge of parsing/lexing, I am at loss with ANTLR) Then it occurred to me that there must existing parsers for many formats, so before I start writing yet another a brand new and potentially buggy version of the wheel, I figured I would check what parsers already exist and can be reused in a commercial product. I could use parsers for just about every format in existence, so this question would be a good place to make a list of all existing free parsers written in C#, if there are any. Thanks in advance for your suggestions

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  • How to add precedence to LALR parser like in YACC?

    - by greenoldman
    Please note, I am asking about writing LALR parser, not writing rules for LALR parser. What I need is... ...to mimic YACC precedence definitions. I don't know how it is implemented, and below I describe what I've done and read so far. For now I have basic LALR parser written. Next step -- adding precedence, so 2+3*4 could be parsed as 2+(3*4). I've read about precedence parsers, however I don't see how to fit such model into LALR. I don't understand two points: how to compute when insert parenthesis generator how to compute how many parenthesis the generator should create I insert generators when the symbols is taken from input and put at the stack, right? So let's say I have something like this (| denotes boundary between stack and input): ID = 5 | + ..., at this point I add open, so it gives ID = < 5 | + ..., then I read more input ID = < 5 + | 5 ... and more ID = < 5 + 5 | ; ... and more ID = < 5 + 5 ; | ... At this point I should have several reduce moves in normal LALR, but the open parenthesis does not match so I continue reading more input. Which does not make sense. So this was when problem. And about count, let's say I have such data < 2 + < 3 * 4 >. As human I can see that the last generator should create 2 parenthesis, but how to compute this? After all there could be two scenarios: ( 2 + ( 3 *4 )) -- parenthesis is used to show the outcome of generator or (2 + (( 3 * 4 ) ^ 5) because there was more input Please note that in both cases before 3 was open generator, and after 4 there was close generator. However in both cases, after reading 4 I have to reduce, so I have to know what generator "creates".

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  • Text extraction with java html parsers

    - by zenmonkey
    I want to use an html parser that does the following in a nice, elegant way Extract text (this is most important) Extract links, meta keywords Reconstruct original doc (optional but nice feature to have) From my investigation so far jericho seems to fit. Any other open source libraries you guys would recommend?

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  • Learning Treetop

    - by cmartin
    I'm trying to teach myself Ruby's Treetop grammar generator. I am finding that not only is the documentation woefully sparse for the "best" one out there, but that it doesn't seem to work as intuitively as I'd hoped. On a high level, I'd really love a better tutorial than the on-site docs or the video, if there is one. On a lower level, here's a grammar I cannot get to work at all: grammar SimpleTest rule num (float / integer) end rule float ( (( '+' / '-')? plain_digits '.' plain_digits) / (( '+' / '-')? plain_digits ('E' / 'e') plain_digits ) / (( '+' / '-')? plain_digits '.') / (( '+' / '-')? '.' plain_digits) ) { def eval text_value.to_f end } end rule integer (( '+' / '-' )? plain_digits) { def eval text_value.to_i end } end rule plain_digits [0-9] [0-9]* end end When I load it and run some assertions in a very simple test object, I find: assert_equal @parser.parse('3.14').eval,3.14 Works fine, while assert_equal @parser.parse('3').eval,3 raises the error: NoMethodError: private method `eval' called for # If I reverse integer and float on the description, both integers and floats give me this error. I think this may be related to limited lookahead, but I cannot find any information in any of the docs to even cover the idea of evaluating in the "or" context A bit more info that may help. Here's pp information for both those parse() blocks. The float: SyntaxNode+Float4+Float0 offset=0, "3.14" (eval,plain_digits): SyntaxNode offset=0, "" SyntaxNode+PlainDigits0 offset=0, "3": SyntaxNode offset=0, "3" SyntaxNode offset=1, "" SyntaxNode offset=1, "." SyntaxNode+PlainDigits0 offset=2, "14": SyntaxNode offset=2, "1" SyntaxNode offset=3, "4": SyntaxNode offset=3, "4" The Integer... note that it seems to have been defined to follow the integer rule, but not caught the eval() method: SyntaxNode+Integer0 offset=0, "3" (plain_digits): SyntaxNode offset=0, "" SyntaxNode+PlainDigits0 offset=0, "3": SyntaxNode offset=0, "3" SyntaxNode offset=1, "" Update: I got my particular problem working, but I have no clue why: rule integer ( '+' / '-' )? plain_digits { def eval text_value.to_i end } end This makes no sense with the docs that are present, but just removing the extra parentheses made the match include the Integer1 class as well as Integer0. Integer1 is apparently the class holding the eval() method. I have no idea why this is the case. I'm still looking for more info about treetop.

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  • Performance of tokenizing CSS in PHP

    - by Boldewyn
    This is a noob question from someone who hasn't written a parser/lexer ever before. I'm writing a tokenizer/parser for CSS in PHP (please don't repeat with 'OMG, why in PHP?'). The syntax is written down by the W3C neatly here (CSS2.1) and here (CSS3, draft). It's a list of 21 possible tokens, that all (but two) cannot be represented as static strings. My current approach is to loop through an array containing the 21 patterns over and over again, do an if (preg_match()) and reduce the source string match by match. In principle this works really good. However, for a 1000 lines CSS string this takes something between 2 and 8 seconds, which is too much for my project. Now I'm banging my head how other parsers tokenize and parse CSS in fractions of seconds. OK, C is always faster than PHP, but nonetheless, are there any obvious D'Oh! s that I fell into? I made some optimizations, like checking for '@', '#' or '"' as the first char of the remaining string and applying only the relevant regexp then, but this hadn't brought any great performance boosts. My code (snippet) so far: $TOKENS = array( 'IDENT' => '...regexp...', 'ATKEYWORD' => '@...regexp...', 'String' => '"...regexp..."|\'...regexp...\'', //... ); $string = '...CSS source string...'; $stream = array(); // we reduce $string token by token while ($string != '') { $string = ltrim($string, " \t\r\n\f"); // unconsumed whitespace at the // start is insignificant but doing a trim reduces exec time by 25% $matches = array(); // loop through all possible tokens foreach ($TOKENS as $t => $p) { // The '&' is used as delimiter, because it isn't used anywhere in // the token regexps if (preg_match('&^'.$p.'&Su', $string, $matches)) { $stream[] = array($t, $matches[0]); $string = substr($string, strlen($matches[0])); // Yay! We found one that matches! continue 2; } } // if we come here, we have a syntax error and handle it somehow } // result: an array $stream consisting of arrays with // 0 => type of token // 1 => token content

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  • lexers vs parsers

    - by Naveen
    Are lexers and parsers really that different in theory ? It seems fashionable to hate regular expressions: coding horror, another blog post. However, popular lexing based tools: pygments, geshi, or prettify, all use regular expressions. They seem to lex anything... When is lexing enough, when do you need EBNF ? Has anyone used the tokens produced by these lexers with bison or antlr parser generators?

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  • How to switch a view after i parse data?

    - by charles Graffeo
    OK my problem is this, i parse a document and after the document is parsed then i want to load to the next view sounds simple but ive been here for like 4 hours playing with code and id appreciete any help u can give me atm. k heres my parserDidEndDocumentCode - (void)parserDidEndDocument:(NSXMLParser *)parser{ IpadSlideShowViewController temp=(IpadSlideShowViewController)[[IpadSlideShowViewController alloc]init]; [temp performSelectorOnMainThread:@selector(switchViews) withObject:nil waitUntilDone:TRUE]; [temp release]; } now what i think should happen is my code will switch the view after it parses the documentation, n its not doing it idk why

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  • Splitting a list in python

    - by blob8108
    Hi, I'm writing a parser in Python. I've converted an input string into a list of tokens, such as: ['(', '2', '.', 'x', '.', '(', '3', '-', '1', ')', '+', '4', ')', '/', '3', '.', 'x', '^', '2'] I want to be able to split the list into multiple lists, like the str.split('+') function. But there doesn't seem to be a way to do my_list.split('+'). Any ideas? Thanks!

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  • NSConcreteData leaked object in objective c ?

    - by Madan Mohan
    Hi Guys, I am getting the NSConcreteData leaked object while testing the leaks in the instruments.It showing in the parser, - (void)parseXMLFileAtURL:(NSURL *)URL { [urlList release]; urlList = [[NSMutableArray alloc] init]; myParser = [[NSXMLParser alloc] initWithContentsOfURL:URL] ;// it showing this line as leaking [myParser setDelegate:self]; [myParser setShouldProcessNamespaces:NO]; [myParser setShouldReportNamespacePrefixes:NO]; [myParser setShouldResolveExternalEntities:NO]; [myParser parse]; [myParser release]; }

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  • why the sexp has array in the end

    - by dorelal
    RubyParser.new.parse "1+1" s(:call, s(:lit, 1), :+, s(:array, s(:lit, 1))) Above code is from this link Why there is array after + in the Sexp. I am just trying to learn ruby parser and the whole AST thing. I have been programming for a while but have no formal education in computer science. So do point to good article which explains AST etc. Please no dragon book. I tried couple of times but couldn't understand much of that book

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  • gwt+xml- can i read through incomplete XML using the GWT XML Parser

    - by Arvind
    I have a requirement where a user is typing in XML in a text area, and I want to show the various nodes in a tree...But as the user is typing in the xml, it wont be a complete xml (since he is still typing in the XML)... How do I read an incomplete XML and correctly generate the tree? I understand how to read an xml and generate nodes in the tree, what I want to know is, how to read the incomplete XML as it is being typed in

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  • perl xml parser get xml content within xml

    - by user391986
    How can I use XMLParser to get the item-@url, item-@replace and item-"value inside" for the content as a string of the node where item-@cone="one"? <cstep> <item cone="one" url="http://google.com/{ccc}/cthree" replace="{ccc}"> <itemsub conesub="conesub"> <itemsubsub conesubsub="conesubsub" /> </itemsub> </item> <item cone="two" url="http://google.com/{ccc}/cthree" replace="{ccc}"> <itemsub conesub="conesub"> <itemsubsub conesubsub="conesubsub" /> </itemsub> </item> </cstep>

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