io.webfolder.cdp.command

Interface Debugger

public interface Debugger

Debugger domain exposes JavaScript debugging capabilities It allows setting and removing breakpoints, stepping through execution, exploring stack traces, etc

Method Summary

Modifier and Type	Method and Description
void	continueToLocation(Location location) Continues execution until specific location is reached.
void	continueToLocation(Location location, TargetCallFrames targetCallFrames) Continues execution until specific location is reached.
void	disable() Disables debugger for given page.
void	enable() Enables debugger for the given page.
EvaluateOnCallFrameResult	evaluateOnCallFrame(String callFrameId, String expression) Evaluates expression on a given call frame.
EvaluateOnCallFrameResult	evaluateOnCallFrame(String callFrameId, String expression, String objectGroup, Boolean includeCommandLineAPI, Boolean silent, Boolean returnByValue, Boolean generatePreview, Boolean throwOnSideEffect) Evaluates expression on a given call frame.
List<BreakLocation>	getPossibleBreakpoints(Location start) Returns possible locations for breakpoint.
List<BreakLocation>	getPossibleBreakpoints(Location start, Location end, Boolean restrictToFunction) Returns possible locations for breakpoint.
String	getScriptSource(String scriptId) Returns source for the script with given id.
void	pause() Stops on the next JavaScript statement.
void	removeBreakpoint(String breakpointId) Removes JavaScript breakpoint.
RestartFrameResult	restartFrame(String callFrameId) Restarts particular call frame from the beginning.
void	resume() Resumes JavaScript execution.
void	scheduleStepIntoAsync() Steps into next scheduled async task if any is scheduled before next pause.
List<SearchMatch>	searchInContent(String scriptId, String query) Searches for given string in script content.
List<SearchMatch>	searchInContent(String scriptId, String query, Boolean caseSensitive, Boolean isRegex) Searches for given string in script content.
void	setAsyncCallStackDepth(Integer maxDepth) Enables or disables async call stacks tracking.
void	setBlackboxedRanges(String scriptId, List<ScriptPosition> positions) Makes backend skip steps in the script in blackboxed ranges.
void	setBlackboxPatterns(List<String> patterns) Replace previous blackbox patterns with passed ones.
SetBreakpointResult	setBreakpoint(Location location) Sets JavaScript breakpoint at a given location.
SetBreakpointResult	setBreakpoint(Location location, String condition) Sets JavaScript breakpoint at a given location.
SetBreakpointByUrlResult	setBreakpointByUrl(Integer lineNumber) Sets JavaScript breakpoint at given location specified either by URL or URL regex.
SetBreakpointByUrlResult	setBreakpointByUrl(Integer lineNumber, String url, String urlRegex, String scriptHash, Integer columnNumber, String condition) Sets JavaScript breakpoint at given location specified either by URL or URL regex.
void	setBreakpointsActive(Boolean active) Activates / deactivates all breakpoints on the page.
void	setPauseOnExceptions(PauseOnExceptionState state) Defines pause on exceptions state.
SetScriptSourceResult	setScriptSource(String scriptId, String scriptSource) Edits JavaScript source live.
SetScriptSourceResult	setScriptSource(String scriptId, String scriptSource, Boolean dryRun) Edits JavaScript source live.
void	setSkipAllPauses(Boolean skip) Makes page not interrupt on any pauses (breakpoint, exception, dom exception etc).
void	setVariableValue(Integer scopeNumber, String variableName, CallArgument newValue, String callFrameId) Changes value of variable in a callframe.
void	stepInto() Steps into the function call.
void	stepOut() Steps out of the function call.
void	stepOver() Steps over the statement.

Method Detail

enable

void enable()

Enables debugger for the given page. Clients should not assume that the debugging has been enabled until the result for this command is received.

disable

void disable()

Disables debugger for given page.

setBreakpointsActive

void setBreakpointsActive(Boolean active)

Activates / deactivates all breakpoints on the page.

Parameters:

active - New value for breakpoints active state.

setSkipAllPauses

void setSkipAllPauses(Boolean skip)

Makes page not interrupt on any pauses (breakpoint, exception, dom exception etc).

Parameters:

skip - New value for skip pauses state.

setBreakpointByUrl

SetBreakpointByUrlResult setBreakpointByUrl(Integer lineNumber,
                                            String url,
                                            String urlRegex,
                                            String scriptHash,
                                            Integer columnNumber,
                                            String condition)

Sets JavaScript breakpoint at given location specified either by URL or URL regex. Once this command is issued, all existing parsed scripts will have breakpoints resolved and returned in locations property. Further matching script parsing will result in subsequent breakpointResolved events issued. This logical breakpoint will survive page reloads.

Parameters:

lineNumber - Line number to set breakpoint at.

url - URL of the resources to set breakpoint on.

urlRegex - Regex pattern for the URLs of the resources to set breakpoints on. Either url or urlRegex must be specified.

scriptHash - Script hash of the resources to set breakpoint on.

columnNumber - Offset in the line to set breakpoint at.

condition - Expression to use as a breakpoint condition. When specified, debugger will only stop on the breakpoint if this expression evaluates to true.

Returns:

SetBreakpointByUrlResult

setBreakpoint

SetBreakpointResult setBreakpoint(Location location,
                                  String condition)

Sets JavaScript breakpoint at a given location.

Parameters:

location - Location to set breakpoint in.

condition - Expression to use as a breakpoint condition. When specified, debugger will only stop on the breakpoint if this expression evaluates to true.

Returns:

SetBreakpointResult

removeBreakpoint

void removeBreakpoint(String breakpointId)

Removes JavaScript breakpoint.

getPossibleBreakpoints

List<BreakLocation> getPossibleBreakpoints(Location start,
                                           Location end,
                                           Boolean restrictToFunction)

Returns possible locations for breakpoint. scriptId in start and end range locations should be the same.

Parameters:

start - Start of range to search possible breakpoint locations in.

end - End of range to search possible breakpoint locations in (excluding). When not specified, end of scripts is used as end of range.

restrictToFunction - Only consider locations which are in the same (non-nested) function as start.

Returns:

List of the possible breakpoint locations.

continueToLocation

void continueToLocation(Location location,
                        TargetCallFrames targetCallFrames)

Continues execution until specific location is reached.

Parameters:

location - Location to continue to.

stepOver

void stepOver()

Steps over the statement.

stepInto

void stepInto()

Steps into the function call.

stepOut

void stepOut()

Steps out of the function call.

pause

void pause()

Stops on the next JavaScript statement.

scheduleStepIntoAsync

void scheduleStepIntoAsync()

Steps into next scheduled async task if any is scheduled before next pause. Returns success when async task is actually scheduled, returns error if no task were scheduled or another scheduleStepIntoAsync was called.

resume

void resume()

Resumes JavaScript execution.

searchInContent

List<SearchMatch> searchInContent(String scriptId,
                                  String query,
                                  Boolean caseSensitive,
                                  Boolean isRegex)

Searches for given string in script content.

Parameters:

scriptId - Id of the script to search in.

query - String to search for.

caseSensitive - If true, search is case sensitive.

isRegex - If true, treats string parameter as regex.

Returns:

List of search matches.

setScriptSource

SetScriptSourceResult setScriptSource(String scriptId,
                                      String scriptSource,
                                      Boolean dryRun)

Edits JavaScript source live.

Parameters:

scriptId - Id of the script to edit.

scriptSource - New content of the script.

dryRun - If true the change will not actually be applied. Dry run may be used to get result description without actually modifying the code.

Returns:

SetScriptSourceResult

restartFrame

RestartFrameResult restartFrame(String callFrameId)

Restarts particular call frame from the beginning.

Parameters:

callFrameId - Call frame identifier to evaluate on.

Returns:

RestartFrameResult

getScriptSource

String getScriptSource(String scriptId)

Returns source for the script with given id.

Parameters:

scriptId - Id of the script to get source for.

Returns:

Script source.

setPauseOnExceptions

void setPauseOnExceptions(PauseOnExceptionState state)

Defines pause on exceptions state. Can be set to stop on all exceptions, uncaught exceptions or no exceptions. Initial pause on exceptions state is none.

Parameters:

state - Pause on exceptions mode.

evaluateOnCallFrame

EvaluateOnCallFrameResult evaluateOnCallFrame(String callFrameId,
                                              String expression,
                                              String objectGroup,
                                              Boolean includeCommandLineAPI,
                                              Boolean silent,
                                              Boolean returnByValue,
                                              Boolean generatePreview,
                                              Boolean throwOnSideEffect)

Evaluates expression on a given call frame.

Parameters:

callFrameId - Call frame identifier to evaluate on.

expression - Expression to evaluate.

objectGroup - String object group name to put result into (allows rapid releasing resulting object handles using releaseObjectGroup).

includeCommandLineAPI - Specifies whether command line API should be available to the evaluated expression, defaults to false.

silent - In silent mode exceptions thrown during evaluation are not reported and do not pause execution. Overrides setPauseOnException state.

returnByValue - Whether the result is expected to be a JSON object that should be sent by value.

generatePreview - Whether preview should be generated for the result.

throwOnSideEffect - Whether to throw an exception if side effect cannot be ruled out during evaluation.

Returns:

EvaluateOnCallFrameResult

setVariableValue

void setVariableValue(Integer scopeNumber,
                      String variableName,
                      CallArgument newValue,
                      String callFrameId)

Changes value of variable in a callframe. Object-based scopes are not supported and must be mutated manually.

Parameters:

scopeNumber - 0-based number of scope as was listed in scope chain. Only 'local', 'closure' and 'catch' scope types are allowed. Other scopes could be manipulated manually.

variableName - Variable name.

newValue - New variable value.

callFrameId - Id of callframe that holds variable.

setAsyncCallStackDepth

void setAsyncCallStackDepth(Integer maxDepth)

Enables or disables async call stacks tracking.

Parameters:

maxDepth - Maximum depth of async call stacks. Setting to 0 will effectively disable collecting async call stacks (default).

setBlackboxPatterns

void setBlackboxPatterns(List<String> patterns)

Replace previous blackbox patterns with passed ones. Forces backend to skip stepping/pausing in scripts with url matching one of the patterns. VM will try to leave blackboxed script by performing 'step in' several times, finally resorting to 'step out' if unsuccessful.

Parameters:

patterns - Array of regexps that will be used to check script url for blackbox state.

setBlackboxedRanges

void setBlackboxedRanges(String scriptId,
                         List<ScriptPosition> positions)

Makes backend skip steps in the script in blackboxed ranges. VM will try leave blacklisted scripts by performing 'step in' several times, finally resorting to 'step out' if unsuccessful. Positions array contains positions where blackbox state is changed. First interval isn't blackboxed. Array should be sorted.

Parameters:

scriptId - Id of the script.

setBreakpointByUrl

SetBreakpointByUrlResult setBreakpointByUrl(Integer lineNumber)

Sets JavaScript breakpoint at given location specified either by URL or URL regex. Once this command is issued, all existing parsed scripts will have breakpoints resolved and returned in locations property. Further matching script parsing will result in subsequent breakpointResolved events issued. This logical breakpoint will survive page reloads.

Parameters:

lineNumber - Line number to set breakpoint at.

Returns:

SetBreakpointByUrlResult

setBreakpoint

SetBreakpointResult setBreakpoint(Location location)

Sets JavaScript breakpoint at a given location.

Parameters:

location - Location to set breakpoint in.

Returns:

SetBreakpointResult

getPossibleBreakpoints

List<BreakLocation> getPossibleBreakpoints(Location start)

Returns possible locations for breakpoint. scriptId in start and end range locations should be the same.

Parameters:

start - Start of range to search possible breakpoint locations in.

Returns:

List of the possible breakpoint locations.

continueToLocation

void continueToLocation(Location location)

Continues execution until specific location is reached.

Parameters:

location - Location to continue to.

searchInContent

List<SearchMatch> searchInContent(String scriptId,
                                  String query)

Searches for given string in script content.

Parameters:

scriptId - Id of the script to search in.

query - String to search for.

Returns:

List of search matches.

setScriptSource

SetScriptSourceResult setScriptSource(String scriptId,
                                      String scriptSource)

Edits JavaScript source live.

Parameters:

scriptId - Id of the script to edit.

scriptSource - New content of the script.

Returns:

SetScriptSourceResult

evaluateOnCallFrame

EvaluateOnCallFrameResult evaluateOnCallFrame(String callFrameId,
                                              String expression)

Evaluates expression on a given call frame.

Parameters:

callFrameId - Call frame identifier to evaluate on.

expression - Expression to evaluate.

Returns:

EvaluateOnCallFrameResult