Class for user-side handling of websocket with THttpServer.
Approximate how-to:
TUserWSHandler *handler = new TUserWSHandler("name1","title"); THttpServer *server = new THttpServer("http:8090"); server->Register("/subfolder", handler)
let ws = new WebSocket("ws://hostname:8090/subfolder/name1/root.websocket");
if (arg->IsMethod("WS_CONNECT")) { return true; // to accept incoming request } if (arg->IsMethod("WS_READY")) { fWSId = arg->GetWSId(); // fWSId should be member of the user class return true; // connection established } if (arg->IsMethod("WS_CLOSE")) { fWSId = 0; return true; // confirm close of socket } if (arg->IsMethod("WS_DATA")) { std::string str((const char *)arg->GetPostData(), arg->GetPostDataLength()); std::cout << "got string " << str << std::endl; SendCharStarWS(fWSId, "our reply"); return true; }
$ROOTSYS/tutorials/http/ws.C
and $ROOTSYS/tutorials/http/ws.htm
functional example Definition at line 25 of file THttpWSHandler.h.
Public Member Functions | |
virtual | ~THttpWSHandler () |
destructor Make sure that all sending threads are stopped correctly | |
virtual Bool_t | AllowMTProcess () const |
Allow processing of WS requests in arbitrary thread. | |
virtual Bool_t | AllowMTSend () const |
Allow send operations in separate threads (when supported by websocket engine) | |
virtual Bool_t | CanServeFiles () const |
If returns kTRUE, allows to serve files from subdirectories where page content is situated. | |
void | CloseWS (UInt_t wsid) |
Close connection with given websocket id. | |
virtual TString | GetDefaultPageContent () |
Provides content of default web page for registered web-socket handler Can be content of HTML page or file name, where content should be taken For instance, file:/home/user/test.htm or file:$jsrootsys/files/canvas.htm If not specified, default index.htm page will be shown Used by the webcanvas. | |
Int_t | GetNumWS () |
Returns current number of websocket connections. | |
UInt_t | GetWS (Int_t num=0) |
Return websocket id with given sequential number Number of websockets returned with GetNumWS() method. | |
Bool_t | HasWS (UInt_t wsid) |
Return kTRUE if websocket with given ID exists. | |
TClass * | IsA () const override |
Bool_t | IsDisabled () const |
Returns true when processing of websockets is disabled, set shortly before handler need to be destroyed. | |
Bool_t | IsSyncMode () const |
Returns processing mode of WS handler If sync mode is TRUE (default), all event processing and data sending performed in main thread All send functions are blocking and must be performed from main thread If sync mode is false, WS handler can be used from different threads and starts its own sending threads. | |
virtual Bool_t | ProcessWS (THttpCallArg *arg)=0 |
Int_t | SendCharStarWS (UInt_t wsid, const char *str) |
Send string via given websocket id. | |
Int_t | SendHeaderWS (UInt_t wsid, const char *hdr, const void *buf, int len) |
Send binary data with text header via given websocket id. | |
Int_t | SendWS (UInt_t wsid, const void *buf, int len) |
Send binary data via given websocket id. | |
void | SetDisabled () |
Disable all processing of websockets, normally called shortly before destructor. | |
void | Streamer (TBuffer &) override |
Stream an object of class TObject. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
Public Member Functions inherited from TNamed | |
TNamed () | |
TNamed (const char *name, const char *title) | |
TNamed (const TNamed &named) | |
TNamed copy ctor. | |
TNamed (const TString &name, const TString &title) | |
virtual | ~TNamed () |
TNamed destructor. | |
void | Clear (Option_t *option="") override |
Set name and title to empty strings (""). | |
TObject * | Clone (const char *newname="") const override |
Make a clone of an object using the Streamer facility. | |
Int_t | Compare (const TObject *obj) const override |
Compare two TNamed objects. | |
void | Copy (TObject &named) const override |
Copy this to obj. | |
virtual void | FillBuffer (char *&buffer) |
Encode TNamed into output buffer. | |
const char * | GetName () const override |
Returns name of object. | |
const char * | GetTitle () const override |
Returns title of object. | |
ULong_t | Hash () const override |
Return hash value for this object. | |
TClass * | IsA () const override |
Bool_t | IsSortable () const override |
void | ls (Option_t *option="") const override |
List TNamed name and title. | |
TNamed & | operator= (const TNamed &rhs) |
TNamed assignment operator. | |
void | Print (Option_t *option="") const override |
Print TNamed name and title. | |
virtual void | SetName (const char *name) |
Set the name of the TNamed. | |
virtual void | SetNameTitle (const char *name, const char *title) |
Set all the TNamed parameters (name and title). | |
virtual void | SetTitle (const char *title="") |
Set the title of the TNamed. | |
virtual Int_t | Sizeof () const |
Return size of the TNamed part of the TObject. | |
void | Streamer (TBuffer &) override |
Stream an object of class TObject. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
Public Member Functions inherited from TObject | |
TObject () | |
TObject constructor. | |
TObject (const TObject &object) | |
TObject copy ctor. | |
virtual | ~TObject () |
TObject destructor. | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. | |
virtual void | Browse (TBrowser *b) |
Browse object. May be overridden for another default action. | |
ULong_t | CheckedHash () |
Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. | |
virtual void | Delete (Option_t *option="") |
Delete this object. | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Computes distance from point (px,py) to the object. | |
virtual void | Draw (Option_t *option="") |
Default Draw method for all objects. | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1) . | |
virtual void | Dump () const |
Dump contents of object on stdout. | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. | |
virtual void | Execute (const char *method, const char *params, Int_t *error=nullptr) |
Execute method on this object with the given parameter string, e.g. | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr) |
Execute method on this object with parameters stored in the TObjArray. | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to an event at (px,py). | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. | |
virtual TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. | |
virtual const char * | GetIconName () const |
Returns mime type name of object. | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). | |
virtual Option_t * | GetOption () const |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. | |
Bool_t | HasInconsistentHash () const |
Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. | |
void | InvertBit (UInt_t f) |
Bool_t | IsDestructed () const |
IsDestructed. | |
virtual Bool_t | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). | |
virtual Bool_t | IsFolder () const |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). | |
R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
R__ALWAYS_INLINE Bool_t | IsZombie () const |
void | MayNotUse (const char *method) const |
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). | |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification (the base implementation is no-op). | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. | |
void | operator delete (void *ptr) |
Operator delete. | |
void | operator delete (void *ptr, void *vp) |
Only called by placement new when throwing an exception. | |
void | operator delete[] (void *ptr) |
Operator delete []. | |
void | operator delete[] (void *ptr, void *vp) |
Only called by placement new[] when throwing an exception. | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. | |
virtual void | Paint (Option_t *option="") |
This method must be overridden if a class wants to paint itself. | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. | |
virtual void | RecursiveRemove (TObject *obj) |
Recursively remove this object from a list. | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save a primitive as a C++ statement(s) on output stream "out". | |
void | SetBit (UInt_t f) |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. | |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. | |
R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
Int_t | TestBits (UInt_t f) const |
virtual void | UseCurrentStyle () |
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. | |
virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) |
Write this object to the current directory. | |
virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const |
Write this object to the current directory. | |
Static Public Member Functions | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
Static Public Member Functions inherited from TNamed | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
Static Public Member Functions inherited from TObject | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
static Longptr_t | GetDtorOnly () |
Return destructor only flag. | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. | |
Protected Member Functions | |
THttpWSHandler (const char *name, const char *title, Bool_t syncmode=kTRUE) | |
normal constructor | |
virtual void | CompleteWSSend (UInt_t) |
Method called when multi-threaded send operation is completed. | |
virtual std::string | GetCodeVersion () |
Method generate extra suffix for all kinds of loaded code. | |
virtual Bool_t | ProcessBatchHolder (std::shared_ptr< THttpCallArg > &) |
Method used to accept or reject root_batch_holder.js request. | |
virtual void | VerifyDefaultPageContent (std::shared_ptr< THttpCallArg > &arg) |
Method called when default page content is prepared for use By default no-cache header is provided. | |
Protected Member Functions inherited from TObject | |
virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). | |
void | MakeZombie () |
Private Member Functions | |
Int_t | CompleteSend (std::shared_ptr< THttpWSEngine > &engine) |
Complete current send operation. | |
std::shared_ptr< THttpWSEngine > | FindEngine (UInt_t id, Bool_t book_send=kFALSE) |
Find websocket connection handle with given id If book_send parameter specified, have to book send operation under the mutex. | |
Bool_t | HandleWS (std::shared_ptr< THttpCallArg > &arg) |
Process request to websocket Different kind of requests coded into THttpCallArg::Method: | |
Int_t | PerformSend (std::shared_ptr< THttpWSEngine > engine) |
Perform send operation, stored in buffer. | |
void | RemoveEngine (std::shared_ptr< THttpWSEngine > &engine, Bool_t terminate=kFALSE) |
Remove and destroy WS connection. | |
Int_t | RunSendingThrd (std::shared_ptr< THttpWSEngine > engine) |
Send data stored in the buffer. | |
Private Attributes | |
Bool_t | fDisabled {kFALSE} |
! when true, all further operations will be ignored | |
std::vector< std::shared_ptr< THttpWSEngine > > | fEngines |
! list of active WS engines (connections) | |
std::mutex | fMutex |
! protect list of engines | |
Int_t | fSendCnt {0} |
! counter for completed send operations | |
Bool_t | fSyncMode {kTRUE} |
! is handler runs in synchronous mode (default, no multi-threading) | |
Friends | |
class | THttpServer |
Additional Inherited Members | |
Public Types inherited from TObject | |
enum | { kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff } |
enum | { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) } |
enum | EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) } |
enum | EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) } |
Protected Types inherited from TObject | |
enum | { kOnlyPrepStep = (1ULL << ( 3 )) } |
Protected Attributes inherited from TNamed | |
TString | fName |
TString | fTitle |
#include <THttpWSHandler.h>
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protected |
normal constructor
Definition at line 74 of file THttpWSHandler.cxx.
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virtual |
destructor Make sure that all sending threads are stopped correctly
Definition at line 82 of file THttpWSHandler.cxx.
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inlinevirtual |
Allow processing of WS requests in arbitrary thread.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 85 of file THttpWSHandler.h.
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inlinevirtual |
Allow send operations in separate threads (when supported by websocket engine)
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 88 of file THttpWSHandler.h.
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inlinevirtual |
If returns kTRUE, allows to serve files from subdirectories where page content is situated.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 82 of file THttpWSHandler.h.
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static |
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inlinestaticconstexpr |
Definition at line 114 of file THttpWSHandler.h.
void THttpWSHandler::CloseWS | ( | UInt_t | wsid | ) |
Close connection with given websocket id.
Definition at line 255 of file THttpWSHandler.cxx.
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private |
Complete current send operation.
Definition at line 370 of file THttpWSHandler.cxx.
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inlineprotectedvirtual |
Method called when multi-threaded send operation is completed.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 53 of file THttpWSHandler.h.
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inlinestatic |
Definition at line 114 of file THttpWSHandler.h.
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private |
Find websocket connection handle with given id If book_send parameter specified, have to book send operation under the mutex.
Definition at line 127 of file THttpWSHandler.cxx.
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inlineprotectedvirtual |
Method generate extra suffix for all kinds of loaded code.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 63 of file THttpWSHandler.h.
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inlinevirtual |
Provides content of default web page for registered web-socket handler Can be content of HTML page or file name, where content should be taken For instance, file:/home/user/test.htm or file:$jsrootsys/files/canvas.htm If not specified, default index.htm page will be shown Used by the webcanvas.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 79 of file THttpWSHandler.h.
Int_t THttpWSHandler::GetNumWS | ( | ) |
Returns current number of websocket connections.
Definition at line 106 of file THttpWSHandler.cxx.
Return websocket id with given sequential number Number of websockets returned with GetNumWS() method.
Definition at line 116 of file THttpWSHandler.cxx.
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private |
Process request to websocket Different kind of requests coded into THttpCallArg::Method:
"WS_CONNECT" - connection request "WS_READY" - connection ready "WS_CLOSE" - connection closed
All other are normal data, which are delivered to users
Definition at line 195 of file THttpWSHandler.cxx.
Return kTRUE if websocket with given ID exists.
Definition at line 97 of file THttpWSHandler.h.
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inlineoverridevirtual |
Reimplemented from TObject.
Definition at line 114 of file THttpWSHandler.h.
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inline |
Returns true when processing of websockets is disabled, set shortly before handler need to be destroyed.
Definition at line 91 of file THttpWSHandler.h.
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inline |
Returns processing mode of WS handler If sync mode is TRUE (default), all event processing and data sending performed in main thread All send functions are blocking and must be performed from main thread If sync mode is false, WS handler can be used from different threads and starts its own sending threads.
Definition at line 72 of file THttpWSHandler.h.
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private |
Perform send operation, stored in buffer.
Definition at line 323 of file THttpWSHandler.cxx.
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inlineprotectedvirtual |
Method used to accept or reject root_batch_holder.js request.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 56 of file THttpWSHandler.h.
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pure virtual |
Implemented in ROOT::RWebWindowWSHandler.
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private |
Remove and destroy WS connection.
Definition at line 157 of file THttpWSHandler.cxx.
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private |
Send data stored in the buffer.
Returns:
Definition at line 268 of file THttpWSHandler.cxx.
Send string via given websocket id.
Returns:
Definition at line 476 of file THttpWSHandler.cxx.
Send binary data with text header via given websocket id.
Returns:
Definition at line 431 of file THttpWSHandler.cxx.
Send binary data via given websocket id.
Returns:
Definition at line 386 of file THttpWSHandler.cxx.
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inline |
Disable all processing of websockets, normally called shortly before destructor.
Definition at line 94 of file THttpWSHandler.h.
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overridevirtual |
|
inline |
Definition at line 114 of file THttpWSHandler.h.
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inlineprotectedvirtual |
Method called when default page content is prepared for use By default no-cache header is provided.
Reimplemented in ROOT::RWebWindowWSHandler.
Definition at line 60 of file THttpWSHandler.h.
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friend |
Definition at line 27 of file THttpWSHandler.h.
! when true, all further operations will be ignored
Definition at line 31 of file THttpWSHandler.h.
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private |
! list of active WS engines (connections)
Definition at line 34 of file THttpWSHandler.h.
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private |
! protect list of engines
Definition at line 33 of file THttpWSHandler.h.
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private |
! counter for completed send operations
Definition at line 32 of file THttpWSHandler.h.
! is handler runs in synchronous mode (default, no multi-threading)
Definition at line 30 of file THttpWSHandler.h.