From 5896bd6a6ceccf7fb4dcebcef6a6d7a07467206a Mon Sep 17 00:00:00 2001 From: Matthew Schurr Date: Wed, 19 Jul 2017 02:21:54 -0700 Subject: [PATCH] A big bundle of improvements: - The entire exception chain will now be displayed (including suppressions). - Fixed a bunch of bugs in shrink stackframes that could cause incorrect displays. - De-coupled SourceLocators from the local file system. - Fixed a bug where null table keys caused a display issue. - Full stack trace message is now included in the debug screen (since it may get truncated on the left panel). --- README.md | 6 +- src/main/java/spark/debug/DebugScreen.java | 477 +++++++++--------- .../spark/debug/FileSearchSourceLocator.java | 96 ---- .../java/spark/debug/LocalSourceFile.java | 61 +++ .../java/spark/debug/LocalSourceLocator.java | 109 ++++ src/main/java/spark/debug/SourceFile.java | 19 + src/main/java/spark/debug/SourceLocator.java | 14 +- src/main/resources/debugscreen.ftl | 140 ++--- .../css/sparkdebugtools_main.css | 38 +- .../js/lib/sparkdebugtools_jquery.min.js | 4 + .../js/sparkdebugtools_main.js | 93 +++- .../js/sparkdebugtools_shrink-stackframes.js | 104 ++-- 12 files changed, 685 insertions(+), 476 deletions(-) delete mode 100644 src/main/java/spark/debug/FileSearchSourceLocator.java create mode 100644 src/main/java/spark/debug/LocalSourceFile.java create mode 100644 src/main/java/spark/debug/LocalSourceLocator.java create mode 100644 src/main/java/spark/debug/SourceFile.java create mode 100644 src/main/resources/public/sparkdebugtools/js/lib/sparkdebugtools_jquery.min.js diff --git a/README.md b/README.md index dd25713..79800cb 100644 --- a/README.md +++ b/README.md @@ -43,7 +43,7 @@ public class DebugScreenExample { // Subclass the handler: class MyDebugScreen extends DebugScreen { @Override - protected void installTables(LinkedHashMap> tables, Request request, Exception exception) { + protected void installTables(LinkedHashMap> tables, Request request, Throwable exception) { super.installTables(tables, request, exception); Map myTable = new LinkedHashMap<>(); tables.put("My Table", myTable); @@ -62,11 +62,11 @@ By default DebugScreen looks within the folders `src/main/java` and `src/test/ja ```java Spark.exception(Exception.class, new DebugScreen( - ImmutableList.of(new FileSearchSourceLocator(new File("/path/to/source/code"))) + ImmutableList.of(new LocalSourceLocator(new File("/path/to/source/code"))) )); ``` -You can specify multiple locators in the list (later ones are used as fallbacks if earlier ones cannot find a file). If this is still not specific enough for you, you can implement your own `SourceLocator` to find the files and provide that to the handler. +You can specify multiple locators in the list (later ones are used as fallbacks if earlier ones cannot find a file). If this is still not specific enough for you, you can implement your own `SourceLocator` to find the files and provide that to the handler. This could even fetch files over the network if needed. ## Notes: diff --git a/src/main/java/spark/debug/DebugScreen.java b/src/main/java/spark/debug/DebugScreen.java index c2cc188..2a05410 100644 --- a/src/main/java/spark/debug/DebugScreen.java +++ b/src/main/java/spark/debug/DebugScreen.java @@ -1,8 +1,13 @@ package spark.debug; -import java.io.BufferedReader; +import static spark.Spark.exception; +import static spark.Spark.modelAndView; + import java.io.File; -import java.io.FileReader; +import java.io.IOException; +import java.io.PrintWriter; +import java.io.StringWriter; +import java.util.ArrayList; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; @@ -10,262 +15,266 @@ import java.util.function.Function; import java.util.stream.Collectors; +import org.apache.commons.lang3.StringUtils; import org.apache.commons.lang3.exception.ExceptionUtils; +import com.google.common.base.Joiner; +import com.google.common.base.Optional; +import com.google.common.collect.ImmutableList; +import com.google.common.collect.ImmutableMap; + import freemarker.template.Configuration; +import freemarker.template.TemplateException; import freemarker.template.Version; import spark.ExceptionHandler; import spark.Request; import spark.Response; -import spark.Spark; import spark.template.freemarker.FreeMarkerEngine; -import com.google.common.base.Joiner; -import com.google.common.base.Optional; -import com.google.common.collect.ImmutableList; -import com.google.common.collect.ImmutableMap; - -import static spark.Spark.exception; - -public class DebugScreen implements ExceptionHandler { - protected final FreeMarkerEngine templateEngine; - protected final Configuration templateConfig; - protected final SourceLocator[] sourceLocators; - - public DebugScreen() { - this( - new FileSearchSourceLocator("./src/main/java"), - new FileSearchSourceLocator("./src/test/java") - ); - } - - public DebugScreen(SourceLocator... sourceLocators) { - templateEngine = new FreeMarkerEngine(); - templateConfig = new Configuration(new Version(2, 3, 23)); - templateConfig.setClassForTemplateLoading(getClass(), "/"); - templateEngine.setConfiguration(templateConfig); - this.sourceLocators = sourceLocators; - } - - /** - * Enables the debug screen to catch any exception (Exception.class) - * using the default source locators (src/main/java and src/test/java) - */ - public static void enableDebugScreen() { - exception(Exception.class, new DebugScreen()); - } - - /** - * Enables the debug screen to catch any exception (Exception.class) - * using user defined source locators - * - * @param sourceLocators locators to use to find source files - */ - public static void enableDebugScreen(SourceLocator... sourceLocators) { - exception(Exception.class, new DebugScreen(sourceLocators)); +/** + * Renders an interactive in-browser stack trace when a controller throws an uncaught exception. + */ +public class DebugScreen implements ExceptionHandler { + protected final FreeMarkerEngine templateEngine; + protected final Configuration templateConfig; + protected final SourceLocator[] sourceLocators; + + public DebugScreen() { + this(new LocalSourceLocator("./src/main/java"), + new LocalSourceLocator("./src/test/java")); + } + + public DebugScreen(SourceLocator... sourceLocators) { + templateConfig = new Configuration(new Version(2, 3, 23)); + + if (isDevelopmentMode()) { + try { + templateConfig.setDirectoryForTemplateLoading(new File("./src/main/resources")); + } catch (IOException e) { + throw new RuntimeException(e); + } + } else { + templateConfig.setClassForTemplateLoading(getClass(), "/"); } - @Override - public final void handle(Exception exception, Request request, Response response) { - handleThrowable(exception, request, response); - } - - public final void handleThrowable(Throwable throwable, Request request, Response response) { - response.status(500); // Internal Server Error - - // Find the original causing throwable; this will contain the most relevant information to - // display to the user. - while (throwable.getCause() != null) { - throwable = throwable.getCause(); - } - - try { - List> frames = parseFrames(throwable); - - LinkedHashMap model = new LinkedHashMap<>(); - model.put("message", Optional.fromNullable(throwable.getMessage()).or("")); - model.put("plain_exception", ExceptionUtils.getStackTrace(throwable)); - model.put("frames", frames); - model.put("name", throwable.getClass().getCanonicalName().split("\\.")); - model.put("basic_type", throwable.getClass().getSimpleName()); - model.put("type", throwable.getClass().getCanonicalName()); - - LinkedHashMap> tables = new LinkedHashMap<>(); - installTables(tables, request); - model.put("tables", tables); - - response.body(templateEngine.render(Spark.modelAndView(model, "debugscreen.ftl"))); - } catch (Exception e) { - // In case we encounter any exceptions trying to render the error page itself, - // have this simple fallback. - response.body( - "" - + " " - + " " - + " " - + " " - + "

Caught Exception:

" - + " 
" + ExceptionUtils.getStackTrace(throwable) + "
" - + "

Caught Exception Rendering DebugScreen:

" - + " 
" + ExceptionUtils.getStackTrace(e) + "
" - + " " - + "" - ); - } + templateEngine = new FreeMarkerEngine(templateConfig); + this.sourceLocators = sourceLocators; + } + + private static boolean isDevelopmentMode() { + return "true".equals(System.getenv("SPARK_DEBUG_SCREEN_DEV")); + } + + /** + * Enables the debug screen to catch any exception (Exception.class). + * Assumes code is located in src/main/java (relative to working directory). + * See README.md for advanced usage instructions. + * @throws Exception + */ + public static void enableDebugScreen() { + exception(Exception.class, new DebugScreen()); + } + + /** + * Enables the debug screen to catch any exception (Exception.class). + * Finds code using the provided source locators. + * @param sourceLocators Used to find source files (in priority order). + */ + public static void enableDebugScreen(SourceLocator... sourceLocators) { + exception(Exception.class, new DebugScreen(sourceLocators)); + } + + @Override + public void handle(Exception exception, Request request, Response response) { + handleThrowable(exception, request, response); + } + + private void addToChain(Throwable throwable, + ArrayList> exceptionChain, + boolean isSuppressed) { + LinkedHashMap exceptionInfo = new LinkedHashMap<>(); + String trace = traceToString(throwable); + exceptionInfo.put("frames", parseFrames(throwable)); + exceptionInfo.put("short_message", StringUtils.abbreviate(Optional.fromNullable(throwable.getMessage()).or(""), 100)); + exceptionInfo.put("full_trace", trace); + exceptionInfo.put("show_full_trace", trace.length() > 100); + exceptionInfo.put("message", Optional.fromNullable(throwable.getMessage()).or("")); + exceptionInfo.put("plain_exception", ExceptionUtils.getStackTrace(throwable)); + exceptionInfo.put("name", throwable.getClass().getCanonicalName().split("\\.")); + exceptionInfo.put("basic_type", throwable.getClass().getSimpleName()); + exceptionInfo.put("type", throwable.getClass().getCanonicalName()); + exceptionInfo.put("suppressed", isSuppressed); + exceptionChain.add(exceptionInfo); + } + + private void crawlChain(Throwable throwable, + ArrayList> exceptionChain, + boolean isSuppressed) { + addToChain(throwable, exceptionChain, isSuppressed); + + for (Throwable suppressedThrowable : throwable.getSuppressed()) { + crawlChain(suppressedThrowable, exceptionChain, true); } - /** - * Install any tables you want to be shown in environment details. - * - * @param tables the map containing the tables to display on the debug screen - */ - protected void installTables(LinkedHashMap> tables, Request request) { - tables.put("Headers", setToLinkedHashMap(request.headers(), h -> h, request::headers)); - tables.put("Spark Request properties", getRequestInfo(request)); - tables.put("Route Parameters", request.params()); - tables.put("Query Parameters", setToLinkedHashMap(request.queryParams(), p -> p, request::queryParams)); - tables.put("Session Attributes", setToLinkedHashMap(request.session().attributes(), a -> a, request.session()::attribute)); - tables.put("Request Attributes", setToLinkedHashMap(request.attributes(), a -> a, request::attribute)); - tables.put("Cookies", request.cookies()); - tables.put("Environment", getEnvironmentInfo()); + if (throwable.getCause() != null) { + crawlChain(throwable.getCause(), exceptionChain, false); } - - private LinkedHashMap setToLinkedHashMap(Set set, - Function keyMapper, - Function valueMapper) { - return set.stream().collect(Collectors.toMap(keyMapper, valueMapper, (k, v) -> k, LinkedHashMap::new)); + } + + public final void handleThrowable(Throwable throwable, + Request request, + Response response) { + // Set the response status (important so that AJAX requests will fail). + response.status(500); + + try { + LinkedHashMap model = new LinkedHashMap<>(); + ArrayList> exceptionChain = new ArrayList<>(); + crawlChain(throwable, exceptionChain, false); + model.put("exceptions", exceptionChain); + + LinkedHashMap> tables = new LinkedHashMap<>(); + installTables(tables, request, throwable); + model.put("tables", tables); + + response.type("text/html; charset=UTF-8"); + response.body(templateEngine.render(modelAndView(model, "debugscreen.ftl"))); + } catch (Exception e) { + // A simple fall-back (in case an error occurs trying to generate the debug screen itself). + response.body( + "" + + " " + + " " + + " " + + " " + + "

Caught Exception:

" + + " 
"
+              +        ExceptionUtils.getStackTrace(throwable)
+              + "
" + + "

Caught Exception (while rendering debug screen):

" + + " 
"
+              +        ExceptionUtils.getStackTrace(e)
+              + "
" + + " " + + ""); } - - private LinkedHashMap getEnvironmentInfo() { - LinkedHashMap environment = new LinkedHashMap<>(); - environment.put("Thread ID", Thread.currentThread().getId()); - return environment; + } + + protected void installTables(LinkedHashMap> tables, + Request request, + Throwable throwable) { + tables.put("Request Headers", setToLinkedHashMap(request.headers(), h -> h, request::headers)); + tables.put("Request Properties", getRequestInfo(request)); + tables.put("Route Parameters", request.params()); + tables.put("Query Parameters", setToLinkedHashMap(request.queryParams(), p -> p, request::queryParams)); + tables.put("Session Attributes", setToLinkedHashMap(request.session().attributes(), a -> a, request.session()::attribute)); + tables.put("Request Attributes", setToLinkedHashMap(request.attributes(), a -> a, request::attribute)); + tables.put("Cookies", request.cookies()); + tables.put("Environment", getEnvironmentInfo()); + tables.put("Environment Variables", System.getenv()); + } + + private LinkedHashMap getEnvironmentInfo() { + LinkedHashMap environment = new LinkedHashMap<>(); + environment.put("Thread ID", Thread.currentThread().getId()); + return environment; + } + + private LinkedHashMap getRequestInfo(Request request) { + LinkedHashMap req = new LinkedHashMap<>(); + req.put("URL", Optional.fromNullable(request.url()).or("-")); + req.put("Scheme", Optional.fromNullable(request.scheme()).or("-")); + req.put("Method", Optional.fromNullable(request.requestMethod()).or("-")); + req.put("Protocol", Optional.fromNullable(request.protocol()).or("-")); + req.put("Remote IP", Optional.fromNullable(request.ip()).or("-")); + return req; + } + + private LinkedHashMap setToLinkedHashMap(Set set, + Function keyMapper, + Function valueMapper) { + return set.stream().collect(Collectors.toMap(keyMapper, + valueMapper, + (k, v) -> k, + LinkedHashMap::new)); + } + + private String traceToString(Throwable t) { + StringWriter sw = new StringWriter(); + PrintWriter pw = new PrintWriter(sw); + if (t instanceof TemplateException) { + ((TemplateException) t).printStackTrace(pw, false, true, false); + } else { + t.printStackTrace(pw); } - - private LinkedHashMap getRequestInfo(Request request) { - LinkedHashMap req = new LinkedHashMap<>(); - req.put("URL", Optional.fromNullable(request.url()).or("-")); - req.put("Scheme", Optional.fromNullable(request.scheme()).or("-")); - req.put("Method", Optional.fromNullable(request.requestMethod()).or("-")); - req.put("Protocol", Optional.fromNullable(request.protocol()).or("-")); - req.put("Remote IP", Optional.fromNullable(request.ip()).or("-")); - //req.put("Path Info", Optional.fromNullable(request.pathInfo()).or("-")); - //req.put("Query String", Optional.fromNullable(request.queryString()).or("-")); - //req.put("Host", Optional.fromNullable(request.host()).or("-")); - //req.put("Port", Optional.fromNullable(Integer.toString(request.port())).or("-")); - //req.put("URI", Optional.fromNullable(request.uri()).or("-")); - //req.put("Content Type", Optional.fromNullable(request.contentType()).or("-")); - //req.put("Content Length", request.contentLength() == -1 ? "-" : Integer.toString(request.contentLength())); - //req.put("Context Path", Optional.fromNullable(request.contextPath()).or("-")); - //req.put("Body", Optional.fromNullable(request.body()).or("-")); - //req.put("User-Agent", Optional.fromNullable(request.userAgent()).or("-")); - return req; + pw.close(); + return sw.toString(); + } + + /** + * Parses all stack frames for an exception into a view model. + * + * @param e An exception. + * @return A view model for the frames in the exception. + */ + private List> parseFrames(Throwable e) { + ImmutableList.Builder> frames = ImmutableList.builder(); + + for (StackTraceElement frame : e.getStackTrace()) { + frames.add(parseFrame(frame)); } - /** - * Parses all stack frames for an exception into a view model. - * - * @param e An exception. - * @return A view model for the frames in the exception. - */ - private List> parseFrames(Throwable e) { - ImmutableList.Builder> frames = ImmutableList.builder(); - - for (StackTraceElement frame : e.getStackTrace()) { - frames.add(parseFrame(frame)); - } - - return frames.build(); + return frames.build(); + } + + /** + * Parses a stack frame into a view model. + * + * @param sframe A stack trace frame. + * @return A view model for the given frame in the template. + */ + private Map parseFrame(StackTraceElement sframe) { + ImmutableMap.Builder frame = ImmutableMap.builder(); + frame.put("file", Optional.fromNullable(sframe.getFileName()).or("<#unknown>")); + frame.put("class", Optional.fromNullable(sframe.getClassName()).or("")); + frame.put("line", Optional.fromNullable(Integer.toString(sframe.getLineNumber())).or("")); + frame.put("function", Optional.fromNullable(sframe.getMethodName()).or("")); + frame.put("comments", ImmutableList.of()); + + // Try to find the source file corresponding to this exception stack frame. + // Go through the locators in order until the source file is found. + Optional file = Optional.absent(); + for (SourceLocator locator : sourceLocators) { + file = locator.findFileForFrame(sframe); + + if (file.isPresent()) { + break; + } } - /** - * Parses a stack frame into a view model. - * - * @param sframe A stack trace frame. - * @return A view model for the given frame in the template. - */ - private Map parseFrame(StackTraceElement sframe) { - ImmutableMap.Builder frame = ImmutableMap.builder(); - frame.put("file", Optional.fromNullable(sframe.getFileName()).or("<#unknown>")); - frame.put("class", Optional.fromNullable(sframe.getClassName()).or("")); - frame.put("line", Optional.fromNullable(Integer.toString(sframe.getLineNumber())).or("")); - frame.put("function", Optional.fromNullable(sframe.getMethodName()).or("")); - frame.put("comments", ImmutableList.of()); - - // Try to find the source file corresponding to this exception stack frame. - // Go through the locators in order until the source file is found. - Optional file = Optional.absent(); - for (SourceLocator locator : sourceLocators) { - file = locator.findFileForFrame(sframe); - - if (file.isPresent()) { - break; - } - } - - // Fetch +-10 lines from the triggering line. - Optional> codeLines = fetchFileLines(file, sframe); - - if (codeLines.isPresent()) { - // Write the starting line number (1-indexed). - frame.put("code_start", Iterables.reduce(codeLines.get().keySet(), Integer.MAX_VALUE, Math::min) + 1); - - // Write the code as a single string, replacing empty lines with a " ". - frame.put("code", Joiner.on("\n").join( - Iterables.map(codeLines.get().values(), (x) -> x.length() == 0 ? " " : x)) - ); - - // Write the canonical path. - try { - frame.put("canonical_path", file.get().getPath()); - } catch (Exception e) { - // Not much we can do, so ignore and just don't have the canonical path. - } - } + if (file.isPresent()) { + // Fetch +-10 lines from the triggering line. + Optional> codeLines = file.get().getLines(sframe); - return frame.build(); - } + if (codeLines.isPresent()) { + // Write the starting line number (1-indexed). + frame.put("code_start", + Iterables.reduce(codeLines.get().keySet(), Integer.MAX_VALUE, Math::min) + 1); - /** - * Fetches the lines of the source file corresponding to a StackTraceElement (fetches 20 lines total - * centered on the line number given in the trace). - * - * @param file An optional text file. - * @param frame A stack trace frame. - * @return An optional map of line numbers to the content of the lines (not terminated with \n). - */ - private Optional> fetchFileLines(Optional file, StackTraceElement frame) { - // If no line number is given or no file exists, we can't fetch lines. - if (!file.isPresent() || frame.getLineNumber() == -1) { - return Optional.absent(); - } + // Write the code as a single string, replacing empty lines with a " ". + frame.put("code", + Joiner.on("\n").join(Iterables.map(codeLines.get().values(), + (x) -> x.length() == 0 ? " " : x))); - // Otherwise, fetch 20 lines centered on the number provided in the trace. - ImmutableMap.Builder lines = ImmutableMap.builder(); - int start = Math.max(frame.getLineNumber() - 10, 0); - int end = start + 20; - int current = 0; - - try (BufferedReader br = new BufferedReader(new FileReader(file.get()))) { - String line; - while ((line = br.readLine()) != null) { - if (current < start) { - current += 1; - continue; - } - - if (current > end) { - break; - } - - lines.put(current, line); - current += 1; - } + // Write the canonical path. + try { + frame.put("canonical_path", file.get().getPath()); } catch (Exception e) { - // If we get an IOException, not much we can do... just ignore it and move on. - return Optional.absent(); + // Not much we can do, so ignore and just don't have the canonical path. } - - return Optional.of(lines.build()); + } } + + return frame.build(); + } } diff --git a/src/main/java/spark/debug/FileSearchSourceLocator.java b/src/main/java/spark/debug/FileSearchSourceLocator.java deleted file mode 100644 index 7165406..0000000 --- a/src/main/java/spark/debug/FileSearchSourceLocator.java +++ /dev/null @@ -1,96 +0,0 @@ -package spark.debug; - -import java.io.File; -import java.io.IOException; -import java.util.Collection; - -import org.apache.commons.io.FileUtils; -import org.apache.commons.io.filefilter.IOFileFilter; -import org.apache.commons.io.filefilter.TrueFileFilter; - -import com.google.common.base.Optional; - -/** - * Locates source files by searching exhaustively within a base directory. - * The base directory should contain all of the code for your app (e.g. src/main/java). - * - * @author mschurr - */ -public class FileSearchSourceLocator implements SourceLocator { - private final File basePathFile; - - /** - * @param basePath The path of the directory to search for source files within (e.g. src/main/java). - */ - public FileSearchSourceLocator(String basePath) { - this.basePathFile = new File(basePath); - } - - @Override - public Optional findFileForFrame(StackTraceElement frame) { - // If the frame has no file attached, we can't find a source file (obviously). - if (frame.getFileName() == null) { - return Optional.absent(); - } - - if (!basePathFile.exists() || !basePathFile.isDirectory() || !basePathFile.canRead()) { - return Optional.absent(); - } - - // Find a list of all matching files (any files with the same name as the name provided - // in the trace) within the base path. - - // We may not find a file in all cases because sometimes source files are just not - // available (e.g. we only have .class files in compiled applications). - - // Since the stack trace only gives the file base name (and not the actual path), - // we need to enumerate all possibilities. - Collection possibilities = FileUtils.listFiles(basePathFile, new IOFileFilter() { - @Override - public boolean accept(File file) { - return file.getName().equals(frame.getFileName()); - } - - @Override - public boolean accept(File dir, String name) { - return name.equals(frame.getFileName()); - } - }, TrueFileFilter.INSTANCE); - - if (possibilities.size() == 1) { - // If there's only one possibility, assume it is the correct source file. - File file = Iterables.first(possibilities); - return Optional.of(file); - } else if (possibilities.size() > 1) { - // If there are multiple possibilities, use the class name to further filter down. - // Assumes the directory structures matches the package name of the class. - // e.g. edu.rice.mschurr.Hello -> src/main/java/edu/rice/mschurr/Hello.java - String className = frame.getClassName(); - - // Remove anything after the $ in the class name to get the base class. - // Effectively, this finds the top-level class name for lambdas and nested classes. - if (className.indexOf('$') != -1) { - className = className.substring(0, className.lastIndexOf('$')); - } - - // Build the effective path of the file (according to package and class name). - // e.g. /path/to/package/Class.java - String path = File.separatorChar + className.replace('.', File.separatorChar) + ".java"; - - // Go through each possibility and see if it is in the desired package. - try { - for (File file : possibilities) { - if (file.getCanonicalPath().endsWith(path)) { - return Optional.of(file); - } - } - } catch (IOException e) { - return Optional.absent(); - } - - return Optional.absent(); - } else { - return Optional.absent(); - } - } -} diff --git a/src/main/java/spark/debug/LocalSourceFile.java b/src/main/java/spark/debug/LocalSourceFile.java new file mode 100644 index 0000000..d1f1b71 --- /dev/null +++ b/src/main/java/spark/debug/LocalSourceFile.java @@ -0,0 +1,61 @@ +package spark.debug; + +import java.io.BufferedReader; +import java.io.File; +import java.io.FileReader; +import java.util.Map; + +import com.google.common.base.Optional; +import com.google.common.collect.ImmutableMap; + +/** + * A source file located on a local file system. + */ +public class LocalSourceFile implements SourceFile { + private final File file; + + public LocalSourceFile(File file) { + this.file = file; + } + + @Override + public String getPath() { + return file.getPath(); + } + + @Override + public Optional> getLines(StackTraceElement frame) { + // If the frame has no line number attached, we can't fetch anything. + if (frame.getLineNumber() < 0) { + return Optional.absent(); + } + + // Otherwise, fetch 20 lines centered on the number provided in the trace. + ImmutableMap.Builder lines = ImmutableMap.builder(); + int start = Math.max(frame.getLineNumber() - 10, 0); + int end = start + 20; + int current = 0; + + try (BufferedReader br = new BufferedReader(new FileReader(file))) { + String line; + while ((line = br.readLine()) != null) { + if (current < start) { + current++; + continue; + } + + if (current > end) { + break; + } + + lines.put(current, line); + current++; + } + + return Optional.of(lines.build()); + } catch (Exception e) { + // Ignore and move on (the frame just won't have a code snippet). + return Optional.absent(); + } + } +} diff --git a/src/main/java/spark/debug/LocalSourceLocator.java b/src/main/java/spark/debug/LocalSourceLocator.java new file mode 100644 index 0000000..50fbfe0 --- /dev/null +++ b/src/main/java/spark/debug/LocalSourceLocator.java @@ -0,0 +1,109 @@ +package spark.debug; + +import java.io.File; +import java.io.IOException; +import java.util.Collection; + +import org.apache.commons.io.FileUtils; +import org.apache.commons.io.filefilter.IOFileFilter; +import org.apache.commons.io.filefilter.TrueFileFilter; + +import com.google.common.base.Optional; + +/** + * Locates source files by searching exhaustively within a base directory. + * The base directory should contain all of the code for your app (e.g. src/main/java). + * Assumes conventions are followed (e.g. path.to.Class -> src/main/java/path/to/Class.java). + */ +public class LocalSourceLocator implements SourceLocator { + private final File basePathFile; + + /** + * @param basePath The path of the directory to search for source files within. + */ + public LocalSourceLocator(String basePath) { + this.basePathFile = new File(basePath); + } + + /** + * @param basePath The directory to search for source files within. + */ + public LocalSourceLocator(File basePath) { + this.basePathFile = basePath; + } + + @Override + public String toString() { + try { + return this.basePathFile.getCanonicalPath(); + } catch (Exception e) { + return this.basePathFile.getPath(); + } + } + + @Override + public Optional findFileForFrame(StackTraceElement frame) { + // Cannot find a file if the frame does not have one. + if (frame.getFileName() == null) { + return Optional.absent(); + } + + // Ignore cases where the directory doesn't exist/cannot be read. + // No point in returning an error here since this is for a debug screen. + if (!basePathFile.exists() || !basePathFile.isDirectory() || !basePathFile.canRead()) { + return Optional.absent(); + } + + // This is where things get a little bit tricky. + // The stack frame only contains the file name (e.g. "File.java"), but not the full path. + // The compiled byte code also does not contain the full path. + // Our strategy here is to find all files with a matching file name and pare them down. + // We may not always find a file (e.g. sometimes they won't be available like in a JAR). + + Collection possibilities = FileUtils.listFiles(basePathFile, new IOFileFilter() { + @Override + public boolean accept(File file) { + return file.getName().equals(frame.getFileName()); + } + + @Override + public boolean accept(File dir, String name) { + return name.equals(frame.getFileName()); + } + }, TrueFileFilter.INSTANCE); + + if (possibilities.size() == 1) { + // Assume the matched file is the source file (we may be wrong, but we can't know). + return Optional.of(new LocalSourceFile(Iterables.first(possibilities))); + } + + if (possibilities.size() > 1) { + // Use the canonical class name to identify the correct file. + // Assumes the directory structure matches the package and name of the class. + // e.g. edu.rice.mschurr.Hello -> src/main/java/edu/rice/mschurr/Hello.java + String className = frame.getClassName(); + + // Remove anything after the $ in the class name to get the declaring class name. + // Effectively, this finds the top-level class name for lambdas and nested classes. + if (className.indexOf('$') != -1) { + className = className.substring(0, className.lastIndexOf('$')); + } + + // Build the expected path of the file. + String path = File.separatorChar + className.replace('.', File.separatorChar) + ".java"; + + // Check each possibility against the expected path. + try { + for (File file : possibilities) { + if (file.getCanonicalPath().endsWith(path)) { + return Optional.of(new LocalSourceFile(file)); + } + } + } catch (IOException e) { + // Ignore (the provided frame just won't have a code snippet). + } + } + + return Optional.absent(); + } +} diff --git a/src/main/java/spark/debug/SourceFile.java b/src/main/java/spark/debug/SourceFile.java new file mode 100644 index 0000000..ddd5f0a --- /dev/null +++ b/src/main/java/spark/debug/SourceFile.java @@ -0,0 +1,19 @@ +package spark.debug; + +import java.util.Map; + +import com.google.common.base.Optional; + +public interface SourceFile { + /** + * @return The path of the file (to display) + */ + public String getPath(); + + /** + * @param frame A stack frame. + * @return Returns +- 10 lines of the file's content (centered on the line in the stack frame). A + * map of line numbers in the file to the contents of that line. + */ + public Optional> getLines(StackTraceElement frame); +} diff --git a/src/main/java/spark/debug/SourceLocator.java b/src/main/java/spark/debug/SourceLocator.java index 2a3cfcb..f083728 100644 --- a/src/main/java/spark/debug/SourceLocator.java +++ b/src/main/java/spark/debug/SourceLocator.java @@ -1,18 +1,14 @@ package spark.debug; -import java.io.File; - import com.google.common.base.Optional; /** * Defines an interface for locating source files. - * - * @author mschurr */ public interface SourceLocator { - /** - * @param frame A stack trace frame. - * @return A file containing the code referenced by the StackTraceElement. - */ - public Optional findFileForFrame(StackTraceElement frame); + /** + * @param frame A stack trace frame. + * @return A file containing the code referenced by the StackTraceElement. + */ + public Optional findFileForFrame(StackTraceElement frame); } diff --git a/src/main/resources/debugscreen.ftl b/src/main/resources/debugscreen.ftl index ea8eb9a..4724a04 100644 --- a/src/main/resources/debugscreen.ftl +++ b/src/main/resources/debugscreen.ftl @@ -2,7 +2,7 @@ - ${basic_type} + ${exceptions?first.basic_type} @@ -13,7 +13,7 @@
-

Spark Framework Debug

+

Spark Framework: Uncaught Exception

-
-
-
-
- <#list name as namePart>${namePart} -
-

- <#if message == "">No Exception Message<#else>${message} -

-
-
-
- - -
-
Stack frames (${frames?size}):
-
- <#assign found = false> - <#list frames as frame> -
-
- ${frames?size - frame?counter} - ${frame.class} - ${frame.function} +
+ <#assign first = true> + <#list exceptions as exception> +
+ <#if !first> +
+ <#if exception.suppressed> + Suppressed: + <#else> + Caused By: + +
+ +
+
+
+ <#list exception.name as namePart>${namePart} +
+

+ <#if exception.message == "">No Exception Message<#else>${exception.short_message} +

- ${frame.file}<#if frame.line != "-1">${frame.line} +
+
Stack Frames (${exception.frames?size}):
+
+ <#list exception.frames as frame> +
+
+ ${exception.frames?size - frame?counter} + ${frame.class} + ${frame.function} +
+ ${frame.file}<#if frame.line != "-1">${frame.line} +
+
- -
+ <#assign first = false> +
+
-
- <#assign found = false> - <#list frames as frame> -
-
- ${frame.file} - <#if frame.canonical_path??> - (${frame.canonical_path}) - -
- <#if frame.code??> - 
${frame.code}
- -
- <#--<#list 0..frames[i].comments?size-1 as commentNo> - <#assign comment = frames[i].comments[commentNo]> -
- ${comment.context} - ${comment.text} -
- --> -
+ <#list exceptions as exception> +
+
+ <#list exception.frames as frame> +
+
+ ${frame.file} + <#if frame.canonical_path??> + (${frame.canonical_path}) + +
+ <#if frame.code??> + 
${frame.code}
+ +
+ <#--<#list 0..frames[i].comments?size-1 as commentNo> + <#assign comment = frames[i].comments[commentNo]> +
+ ${comment.context} + ${comment.text} +
+ --> +
+
+
- -
+
+
+ + <#if exceptions?first.show_full_trace> +
+

Detailed Message

+ 
${exceptions?first.full_trace}
+
+ + <#list tables?keys as label> <#assign data = tables[label]>
@@ -104,7 +121,7 @@ <#list data?keys as k>
${k}
-
${data[k]}
+
${data[k]!""}
@@ -114,12 +131,6 @@
-
@@ -130,6 +141,7 @@ It was ported by Matthew Schurr.
+ diff --git a/src/main/resources/public/sparkdebugtools/css/sparkdebugtools_main.css b/src/main/resources/public/sparkdebugtools/css/sparkdebugtools_main.css index 5d84475..afe4144 100644 --- a/src/main/resources/public/sparkdebugtools/css/sparkdebugtools_main.css +++ b/src/main/resources/public/sparkdebugtools/css/sparkdebugtools_main.css @@ -172,6 +172,7 @@ a { .stack-container { height: 100%; position: relative; + overflow: auto; } .left-panel { @@ -196,12 +197,32 @@ a { color: white; box-sizing: border-box; background-color: #2a2a2a; - padding: 20px; - min-height: 115px; + padding-top: 15px; + padding-left: 20px; + padding-right: 20px; + padding-bottom: 20px; display: flex; align-items: center; } +.left-panel .exception-container:first-of-type header { + padding-top: 20px; + min-height: 115px; +} + +.left-panel .exception-separator { + color: white; + box-sizing: border-box; + background-color: #1a1a1a; + padding-left: 20px; + padding-right: 20px; + padding-top: 10px; + padding-bottom: 10px; + font-size: 18px; + display: flex; + align-items: left; +} + .exception { width: 100%; position: relative; @@ -303,6 +324,10 @@ a { max-width: 100%; } +.frame-function:before { + content: ':: '; +} + .frame-index { position: absolute; font-size: 11px; @@ -336,15 +361,20 @@ a { color: #ee9a00; } -.frame:not(.has-code) .frame-file, .frame:not(.has-code) .frame-function { +.frame:not(.has-code) .frame-file { display: none; } +.frame:not(.has-code) .frame-function { + /*display: none;*/ +} + .frame:not(.has-code) .frame-method-info { margin: 0; } -.frame:not(.has-code) .frame-class { +.frame:not(.has-code) .frame-class, +.frame:not(.has-code) .frame-function { font-size: 11px; } diff --git a/src/main/resources/public/sparkdebugtools/js/lib/sparkdebugtools_jquery.min.js b/src/main/resources/public/sparkdebugtools/js/lib/sparkdebugtools_jquery.min.js new file mode 100644 index 0000000..ff955ca --- /dev/null +++ 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