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nordugrid-arc-nox  1.1.0~rc6
Public Member Functions | Protected Member Functions | Protected Attributes | Static Protected Attributes
Arc::MCC_HTTP_Client Class Reference

This class is a client part of HTTP MCC. More...

#include <MCCHTTP.h>

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List of all members.

Public Member Functions

 MCC_HTTP_Client (Config *cfg)
virtual ~MCC_HTTP_Client (void)
virtual MCC_Status process (Message &, Message &)
 Dummy Message processing method.
virtual void Next (MCCInterface *next, const std::string &label="")
 Add reference to next MCC in chain.
virtual void AddSecHandler (Config *cfg, ArcSec::SecHandler *sechandler, const std::string &label="")
 Add security components/handlers to this MCC.
virtual void Unlink ()
 Removing all links.

Protected Member Functions

MCCInterfaceNext (const std::string &label="")
bool ProcessSecHandlers (Message &message, const std::string &label="") const
 Executes security handlers of specified queue.

Protected Attributes

std::string method_
std::string endpoint_
std::map< std::string,
MCCInterface * > 
 Set of labeled "next" components.
std::map< std::string,
std::list< ArcSec::SecHandler * > > 
 Set of labeled authentication and authorization handlers.

Static Protected Attributes

static Logger logger
 A logger for MCCs.

Detailed Description

This class is a client part of HTTP MCC.

It accepts PayloadRawInterface payload and uses it as body to generate HTTP request. Request is passed to next MCC as PayloadRawInterface type of payload. Returned PayloadStreamInterface payload is parsed into HTTP response and it's body is passed back to calling MCC as PayloadRawInerface. Attributes of request/input message of type HTTP:name are translated into HTTP header with corresponding 'name's. Special attributes HTTP:METHOD and HTTP:ENDPOINT specify method and URL in HTTP request. If not present meathod and URL are taken from configuration. In output/response message following attributes are present: HTTP:CODE - response code of HTTP HTTP:REASON - reason string of HTTP response HTTP:name - all 'name' attributes of HTTP header.

Definition at line 62 of file MCCHTTP.h.

Constructor & Destructor Documentation

Definition at line 334 of file MCCHTTP.cpp.

                                           :MCC_HTTP(cfg) {

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Definition at line 339 of file MCCHTTP.cpp.


Member Function Documentation

void Arc::MCC::AddSecHandler ( Config cfg,
ArcSec::SecHandler sechandler,
const std::string &  label = "" 
) [virtual, inherited]

Add security components/handlers to this MCC.

Security handlers are stacked into a few queues with each queue identified by its label. The queue labelled 'incoming' is executed for every 'request' message after the message is processed by the MCC on the service side and before processing on the client side. The queue labelled 'outgoing' is run for response message before it is processed by MCC algorithms on the service side and after processing on the client side. Those labels are just a matter of agreement and some MCCs may implement different queues executed at various message processing steps.

Definition at line 35 of file MCC.cpp.

    if (sechandler) {
      // need polishing to put the SecHandlerFactory->getinstance here
      XMLNode cn = (*cfg)["SecHandler"];
      Config cfg_(cn);

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MCCInterface * Arc::MCC::Next ( const std::string &  label = "") [protected, inherited]

Definition at line 22 of file MCC.cpp.

    std::map<std::string, MCCInterface *>::iterator n = next_.find(label);
    if (n == next_.end())
      return NULL;
    return n->second;

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void Arc::MCC::Next ( MCCInterface next,
const std::string &  label = "" 
) [virtual, inherited]

Add reference to next MCC in chain.

This method is called by Loader for every potentially labeled link to next component which implements MCCInterface. If next is NULL corresponding link is removed.

Reimplemented in Arc::MCC_TLS_Client, Arc::Plexer, and Arc::MCC_GSI_Client.

Definition at line 15 of file MCC.cpp.

    if (next == NULL)
      next_[label] = next;

Dummy Message processing method.

Just a placeholder.

Reimplemented from Arc::MCC.

Definition at line 342 of file MCCHTTP.cpp.

  // Take Raw payload, add HTTP stuf by using PayloadHTTP and
  // generate new Raw payload to pass further through chain.
  // TODO: do not create new object - use or acqure same one.
  // Extracting payload
  if(!inmsg.Payload()) return make_raw_fault(outmsg);
  PayloadRawInterface* inpayload = NULL;
  try {
    inpayload = dynamic_cast<PayloadRawInterface*>(inmsg.Payload());
  } catch(std::exception& e) { };
  if(!inpayload) return make_raw_fault(outmsg);
  // Making HTTP request
  // Use attributes which higher level MCC may have produced for HTTP
  std::string http_method = inmsg.Attributes()->get("HTTP:METHOD");
  std::string http_endpoint = inmsg.Attributes()->get("HTTP:ENDPOINT");
  if(http_method.empty()) http_method=method_;
  if(http_endpoint.empty()) http_endpoint=endpoint_;
  PayloadHTTP nextpayload(http_method,http_endpoint);
  for(AttributeIterator i = inmsg.Attributes()->getAll();i.hasMore();++i) {
    const char* key = i.key().c_str();
    if(strncmp("HTTP:",key,5) == 0) {
      // TODO: check for special attributes: method, code, reason, endpoint, etc.
      if(strcmp(key,"METHOD") == 0) continue;
      if(strcmp(key,"ENDPOINT") == 0) continue;
  // Creating message to pass to next MCC and setting new payload..
  Message nextinmsg = inmsg;

  // Call next MCC
  MCCInterface* next = Next();
  if(!next) return make_raw_fault(outmsg);
  Message nextoutmsg = outmsg; nextoutmsg.Payload(NULL);
  MCC_Status ret = next->process(nextinmsg,nextoutmsg);
  // Do checks and process response - supported response so far is stream
  // Generated result is HTTP payload with Raw and Stream interfaces
  if(!ret) {
    if(nextoutmsg.Payload()) delete nextoutmsg.Payload();
    return make_raw_fault(outmsg);
  if(!nextoutmsg.Payload()) return make_raw_fault(outmsg);
  PayloadStreamInterface* retpayload = NULL;
  try {
    retpayload = dynamic_cast<PayloadStreamInterface*>(nextoutmsg.Payload());
  } catch(std::exception& e) { };
  if(!retpayload) { delete nextoutmsg.Payload(); return make_raw_fault(outmsg); };
  // Stream retpayload becomes owned by outpayload. This is needed because
  // HTTP payload may postpone extracting information from stream till demanded.
  PayloadHTTP* outpayload  = new PayloadHTTP(*retpayload,true);
  if(!outpayload) { delete retpayload; return make_raw_fault(outmsg); };
  if(!(*outpayload)) { delete outpayload; return make_raw_fault(outmsg); };
  // Check for closed connection during response - not suitable in client mode
  if(outpayload->Method() == "END") { delete outpayload; return make_raw_fault(outmsg); };
  outmsg = nextoutmsg;
  // Payload returned by next.process is not destroyed here because
  // it is now owned by outpayload.
  for(std::map<std::string,std::string>::const_iterator i =
      outpayload->Attributes().begin();i!=outpayload->Attributes().end();++i) {
  return MCC_Status(STATUS_OK);

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bool Arc::MCC::ProcessSecHandlers ( Message message,
const std::string &  label = "" 
) const [protected, inherited]

Executes security handlers of specified queue.

Returns true if the message is authorized for further processing or if there are no security handlers which implement authorization functionality. This is a convenience method and has to be called by the implemention of the MCC.

Definition at line 45 of file MCC.cpp.

    // Each MCC/Service can define security handler queues in the configuration
    // file, the queues have labels specified in handlers configuration 'event'
    // attribute.
    // Security handlers in one queue are called sequentially.
    // Each one should be configured carefully, because there can be some
    // relationship between them (e.g. authentication should be put in front
    // of authorization).
    // The SecHandler::Handle() only returns true/false with true meaning that
    // handler processed message successfuly. If SecHandler implements
    // authorization functionality, it returns false if message is disallowed
    // and true otherwise.
    // If any SecHandler in the handler chain produces some information which
    // will be used by some following handler, the information should be
    // stored in the attributes of message (e.g. the Identity extracted from
    // authentication will be used by authorization to make access control
    // decision).
    std::map<std::string, std::list<ArcSec::SecHandler *> >::const_iterator q =
    if (q == sechandlers_.end()) {
     "No security processing/check requested for '%s'", label);
      return true;
    for (std::list<ArcSec::SecHandler *>::const_iterator h = q->second.begin();
         h != q->second.end(); ++h) {
      const ArcSec::SecHandler *handler = *h;
      if (!handler)
        continue; // Shouldn't happen. Just a sanity check.
      if (!(handler->Handle(&message))) {
        logger.msg(INFO, "Security processing/check failed");
        return false;
    logger.msg(DEBUG, "Security processing/check passed");
    return true;

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void Arc::MCC::Unlink ( ) [virtual, inherited]

Removing all links.

Useful for destroying chains.

Definition at line 29 of file MCC.cpp.

    for (std::map<std::string, MCCInterface *>::iterator n = next_.begin();
         n != next_.end(); n = next_.begin())

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Member Data Documentation

std::string Arc::MCC_HTTP_Client::endpoint_ [protected]

Definition at line 65 of file MCCHTTP.h.

Arc::Logger Arc::MCC_HTTP::logger [static, protected, inherited]

A logger for MCCs.

A logger intended to be the parent of loggers in the different MCCs.

Reimplemented from Arc::MCC.

Definition at line 17 of file MCCHTTP.h.

std::string Arc::MCC_HTTP_Client::method_ [protected]

Definition at line 64 of file MCCHTTP.h.

std::map<std::string, MCCInterface *> Arc::MCC::next_ [protected, inherited]

Set of labeled "next" components.

Each implemented MCC must call process() method of corresponding MCCInterface from this set in own process() method.

Definition at line 50 of file MCC.h.

std::map<std::string, std::list<ArcSec::SecHandler *> > Arc::MCC::sechandlers_ [protected, inherited]

Set of labeled authentication and authorization handlers.

MCC calls sequence of handlers at specific point depending on associated identifier. In most aces those are "in" and "out" for incoming and outgoing messages correspondingly.

Definition at line 57 of file MCC.h.

The documentation for this class was generated from the following files: