src/mgr/Inquirer.cc

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 16    Cache Manager API
   5  *
   6  */
   7
   8 #include "config.h"
   9 #include "base/TextException.h"
  10 #include "comm/Connection.h"
  11 #include "comm/Write.h"
  12 #include "CommCalls.h"
  13 #include "HttpReply.h"
  14 #include "HttpRequest.h"
  15 #include "ipc/UdsOp.h"
  16 #include "mgr/ActionWriter.h"
  17 #include "mgr/IntParam.h"
  18 #include "mgr/Inquirer.h"
  19 #include "mgr/Command.h"
  20 #include "mgr/Request.h"
  21 #include "mgr/Response.h"
  22 #include "SquidTime.h"
  23 #include "errorpage.h"
  24 #include <memory>
  25 #include <algorithm>
  26
  27
  28 CBDATA_NAMESPACED_CLASS_INIT(Mgr, Inquirer);
  29
  30
  31 Mgr::Inquirer::Inquirer(Action::Pointer anAction,
  32                         const Request &aCause, const Ipc::StrandCoords &coords):
  33         Ipc::Inquirer(aCause.clone(), applyQueryParams(coords, aCause.params.queryParams), anAction->atomic() ? 10 : 100),
  34         aggrAction(anAction)
  35 {
  36     conn = aCause.conn;
  37     Ipc::ImportFdIntoComm(conn, SOCK_STREAM, IPPROTO_TCP, Ipc::fdnHttpSocket);
  38
  39     debugs(16, 5, HERE << conn << " action: " << aggrAction);
  40
  41     closer = asyncCall(16, 5, "Mgr::Inquirer::noteCommClosed",
  42                        CommCbMemFunT<Inquirer, CommCloseCbParams>(this, &Inquirer::noteCommClosed));
  43     comm_add_close_handler(conn->fd, closer);
  44 }
  45
  46 /// closes our copy of the client HTTP connection socket
  47 void
  48 Mgr::Inquirer::cleanup()
  49 {
  50     if (Comm::IsConnOpen(conn)) {
  51         removeCloseHandler();
  52         conn->close();
  53     }
  54 }
  55
  56 void
  57 Mgr::Inquirer::removeCloseHandler()
  58 {
  59     if (closer != NULL) {
  60         comm_remove_close_handler(conn->fd, closer);
  61         closer = NULL;
  62     }
  63 }
  64
  65 void
  66 Mgr::Inquirer::start()
  67 {
  68     debugs(16, 5, HERE);
  69     Ipc::Inquirer::start();
  70     Must(Comm::IsConnOpen(conn));
  71     Must(aggrAction != NULL);
  72
  73     std::auto_ptr<MemBuf> replyBuf;
  74     if (strands.empty()) {
  75         LOCAL_ARRAY(char, url, MAX_URL);
  76         snprintf(url, MAX_URL, "%s", aggrAction->command().params.httpUri.termedBuf());
  77         HttpRequest *req = HttpRequest::CreateFromUrl(url);
  78         ErrorState *err = errorCon(ERR_INVALID_URL, HTTP_NOT_FOUND, req);
  79         std::auto_ptr<HttpReply> reply(err->BuildHttpReply());
  80         replyBuf.reset(reply->pack());
  81         errorStateFree(err);
  82     } else {
  83         std::auto_ptr<HttpReply> reply(new HttpReply);
  84         reply->setHeaders(HTTP_OK, NULL, "text/plain", -1, squid_curtime, squid_curtime);
  85         reply->header.putStr(HDR_CONNECTION, "close"); // until we chunk response
  86         replyBuf.reset(reply->pack());
  87     }
  88     writer = asyncCall(16, 5, "Mgr::Inquirer::noteWroteHeader",
  89                        CommCbMemFunT<Inquirer, CommIoCbParams>(this, &Inquirer::noteWroteHeader));
  90     Comm::Write(conn, replyBuf.get(), writer);
  91 }
  92
  93 /// called when we wrote the response header
  94 void
  95 Mgr::Inquirer::noteWroteHeader(const CommIoCbParams& params)
  96 {
  97     debugs(16, 5, HERE);
  98     writer = NULL;
  99     Must(params.flag == COMM_OK);
 100     Must(params.conn.getRaw() == conn.getRaw());
 101     Must(params.size != 0);
 102     // start inquiries at the initial pos
 103     inquire();
 104 }
 105
 106 /// called when the HTTP client or some external force closed our socket
 107 void
 108 Mgr::Inquirer::noteCommClosed(const CommCloseCbParams& params)
 109 {
 110     debugs(16, 5, HERE);
 111     Must(!Comm::IsConnOpen(conn) && params.conn.getRaw() == conn.getRaw());
 112     conn = NULL;
 113     mustStop("commClosed");
 114 }
 115
 116 bool
 117 Mgr::Inquirer::aggregate(Ipc::Response::Pointer aResponse)
 118 {
 119     Mgr::Response& response = static_cast<Response&>(*aResponse);
 120     if (response.hasAction())
 121         aggrAction->add(response.getAction());
 122     return true;
 123 }
 124
 125 void
 126 Mgr::Inquirer::sendResponse()
 127 {
 128     if (!strands.empty() && aggrAction->aggregatable()) {
 129         removeCloseHandler();
 130         AsyncJob::Start(new ActionWriter(aggrAction, conn));
 131         conn = NULL; // should not close because we passed it to ActionWriter
 132     }
 133 }
 134
 135 bool
 136 Mgr::Inquirer::doneAll() const
 137 {
 138     return !writer && Ipc::Inquirer::doneAll();
 139 }
 140
 141 Ipc::StrandCoords
 142 Mgr::Inquirer::applyQueryParams(const Ipc::StrandCoords& aStrands, const QueryParams& aParams)
 143 {
 144     Ipc::StrandCoords sc;
 145
 146     QueryParam::Pointer processesParam = aParams.get("processes");
 147     QueryParam::Pointer workersParam = aParams.get("workers");
 148
 149     if (processesParam == NULL || workersParam == NULL) {
 150         if (processesParam != NULL) {
 151             IntParam* param = dynamic_cast<IntParam*>(processesParam.getRaw());
 152             if (param != NULL && param->type == QueryParam::ptInt) {
 153                 const std::vector<int>& processes = param->value();
 154                 for (Ipc::StrandCoords::const_iterator iter = aStrands.begin();
 155                         iter != aStrands.end(); ++iter) {
 156                     if (std::find(processes.begin(), processes.end(), iter->kidId) != processes.end())
 157                         sc.push_back(*iter);
 158                 }
 159             }
 160         } else if (workersParam != NULL) {
 161             IntParam* param = dynamic_cast<IntParam*>(workersParam.getRaw());
 162             if (param != NULL && param->type == QueryParam::ptInt) {
 163                 const std::vector<int>& workers = param->value();
 164                 for (int i = 0; i < (int)aStrands.size(); ++i) {
 165                     if (std::find(workers.begin(), workers.end(), i + 1) != workers.end())
 166                         sc.push_back(aStrands[i]);
 167                 }
 168             }
 169         } else {
 170             sc = aStrands;
 171         }
 172     }
 173
 174     debugs(0, 0, HERE << "strands kid IDs = ");
 175     for (Ipc::StrandCoords::const_iterator iter = sc.begin(); iter != sc.end(); ++iter) {
 176         debugs(0, 0, HERE << iter->kidId);
 177     }
 178
 179     return sc;
 180 }