Added webapp-runner

4 files changed, 112 insertions, 37 deletions

diff --git a/plugins/fcgi/Makefile b/plugins/fcgi/Makefile
index e878c5d..81502c4 100644
--- a/plugins/fcgi/Makefile
+++ b/plugins/fcgi/Makefile
@@ -27,11 +27,14 @@ PROGSRC=\
 
 SRC=$(PROGSRC)
 
-all: $(PROJECTNAME).so
+all: $(PROJECTNAME).so webapp-runner
 
 $(PROJECTNAME).so: $(SRC:.cpp=.o)
 	$(CXX) $(CXXFLAGS) $^ -shared $(LIBS) -o $@
 
+webapp-runner: webapp-runner.o fastcgiprocess.o
+	$(CXX) $(LDFLAGS) $^ $(LDLIBS) $(LIBS) -o $@
+
 %.d: %.cpp
 	$(CXX) $(CXXFLAGS) -MM -MP -MF $@ -c $<
 
@@ -45,13 +48,14 @@ ADD_DEP=Makefile
 install:
 	mkdir -p $(DESTDIR)/usr/lib/webserver/plugins
 	cp $(PROJECTNAME).so $(DESTDIR)/usr/lib/webserver/plugins
+	cp webapp-runner $(DESTDIR)/usr/bin
 
 # misc ---------------------------------------------------
 
 debs: $(DISTROS)
 
 clean:
-	-rm -f *.o *.so *.d
+	-rm -f *.o *.so *.d webapp-runner
 
 .PHONY: clean install all
 
diff --git a/plugins/fcgi/fastcgiprocess.cpp b/plugins/fcgi/fastcgiprocess.cpp
index dd51583..d43fa75 100644
--- a/plugins/fcgi/fastcgiprocess.cpp
+++ b/plugins/fcgi/fastcgiprocess.cpp
@@ -61,6 +61,51 @@ FastCGIProcess::~FastCGIProcess()
  stop();
 }
 
+void run_fcgi_app(const std::string& command, const std::string& host, unsigned short port)
+{
+ boost::asio::io_context ioc;
+ boost::asio::ip::tcp::resolver resolver(ioc);
+ boost::asio::ip::tcp::acceptor acceptor(ioc);
+ auto const results = resolver.resolve(host.c_str(), std::to_string(port).c_str());
+ if (results.begin() == results.end())
+  std::runtime_error("no resolve result");
+ boost::asio::ip::tcp::endpoint endpoint{*results.begin()};
+ acceptor.open(endpoint.protocol());
+ acceptor.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
+ acceptor.bind(endpoint);
+ acceptor.listen();
+ int fd{acceptor.native_handle()};
+ if (fd != FCGI_LISTENSOCK_FILENO) {
+  close(FCGI_LISTENSOCK_FILENO);
+  dup2(fd, FCGI_LISTENSOCK_FILENO);
+  close(fd);
+ }
+
+ execl(command.c_str(),  command.c_str(), (const char*)nullptr);
+}
+
+void run_fcgi_app(const std::string& command, const std::filesystem::path& socket_path)
+{
+ boost::asio::io_context ioc;
+ boost::asio::local::stream_protocol::acceptor file_acceptor(ioc);
+ std::error_code ec;
+ fs::remove(socket_path, ec); // otherwise we get: "bind: Address already in use"
+
+ boost::asio::local::stream_protocol::endpoint endpoint(socket_path);
+ file_acceptor.open(endpoint.protocol());
+ file_acceptor.set_option(boost::asio::local::stream_protocol::acceptor::reuse_address(true));
+ file_acceptor.bind(endpoint);
+ file_acceptor.listen();
+ int fd {file_acceptor.native_handle()};
+ if (fd != FCGI_LISTENSOCK_FILENO) {
+  close(FCGI_LISTENSOCK_FILENO);
+  dup2(fd, FCGI_LISTENSOCK_FILENO);
+  close(fd);
+ }
+
+ execl(command.c_str(),  command.c_str(), (const char*)nullptr);
+}
+
 void FastCGIProcess::start()
 {
  if (m_pid != 0)
@@ -72,41 +117,10 @@ void FastCGIProcess::start()
 
  if (m_pid == 0) { // child process branch
   try {
-   int fd{};
-   boost::asio::io_context ioc;
-   boost::asio::ip::tcp::resolver resolver(ioc);
-   boost::asio::ip::tcp::acceptor acceptor(ioc);
-   boost::asio::local::stream_protocol::acceptor file_acceptor(ioc);
-
-   if (m_socket_path.empty()) { // tcp connection
-    auto const results = resolver.resolve(m_host.c_str(), std::to_string(m_port).c_str());
-    if (results.begin() == results.end())
-     std::runtime_error("no resolve result");
-    boost::asio::ip::tcp::endpoint endpoint{*results.begin()};
-    acceptor.open(endpoint.protocol());
-    acceptor.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
-    acceptor.bind(endpoint);
-    acceptor.listen();
-    fd = acceptor.native_handle();
-   } else { // unix domain socket
-    std::error_code ec;
-    fs::remove(m_socket_path, ec); // otherwise we get: "bind: Address already in use"
-
-    boost::asio::local::stream_protocol::endpoint endpoint(m_socket_path);
-    file_acceptor.open(endpoint.protocol());
-    file_acceptor.set_option(boost::asio::local::stream_protocol::acceptor::reuse_address(true));
-    file_acceptor.bind(endpoint);
-    file_acceptor.listen();
-    fd = file_acceptor.native_handle();
-   }
-
-   if (fd != FCGI_LISTENSOCK_FILENO) {
-    close(FCGI_LISTENSOCK_FILENO);
-    dup2(fd, FCGI_LISTENSOCK_FILENO);
-    close(fd);
-   }
-
-   execl(m_command.c_str(),  m_command.c_str(), (const char*)nullptr);
+   if (m_socket_path.empty())
+    run_fcgi_app(m_command, m_host, m_port);
+   else
+    run_fcgi_app(m_command, m_socket_path);
   } catch (const std::exception& ex) {
    std::cout << "FastCGI process error: " << ex.what() << std::endl;
   }
diff --git a/plugins/fcgi/fastcgiprocess.h b/plugins/fcgi/fastcgiprocess.h
index 07b6539..18a5d5b 100644
--- a/plugins/fcgi/fastcgiprocess.h
+++ b/plugins/fcgi/fastcgiprocess.h
@@ -10,6 +10,9 @@
 #include <sys/mman.h>
 #include <sys/types.h>
 
+void run_fcgi_app(const std::string& command, const std::string& host, unsigned short port);
+void run_fcgi_app(const std::string& command, const std::filesystem::path& socket_path);
+
 class FastCGIProcess
 {
 public:
diff --git a/plugins/fcgi/webapp-runner.cpp b/plugins/fcgi/webapp-runner.cpp
new file mode 100644
index 0000000..64268f3
--- /dev/null
+++ b/plugins/fcgi/webapp-runner.cpp
@@ -0,0 +1,54 @@
+#include "plugins/fcgi/fastcgiprocess.h"
+
+#include <iostream>
+#include <string>
+
+namespace {
+ void usage()
+ {
+  std::cout << R"(Usage:
+        webapp-runner <host:port> <executable-command>
+
+          or:
+
+        webapp-runner <unix-domain-socket> <executable-command>
+
+Description:
+
+webapp-runner starts the specified executable FastCGI application and connects
+it to the specified unix domain socket or local host:port address. Addresses
+can be specified in IPv4 or IPv6 format.
+
+Examples:
+
+webapp-runner ::1:6543 ./fcgi1
+webapp-runner fcgi-socket0 ./fcgi1
+)" << std::endl;
+ }
+} // namespace
+
+int main(int argc, char* argv[])
+{
+ try {
+  if (argc == 3) {
+   std::string address{argv[1]};
+   std::string command{argv[2]};
+
+   if (auto pos{address.find_last_of(':')}; pos != std::string::npos) {
+    std::string host{address.substr(0, pos)};
+    unsigned short port{static_cast<unsigned short>(std::stoul(address.substr(pos + 1)))};
+    run_fcgi_app(command, host, port);
+   } else {
+    run_fcgi_app(command, address);
+   }
+  } else {
+   usage();
+   exit(0);
+  }
+ } catch (const std::exception& ex) {
+  std::cout << "webapp-runner caught error: " << ex.what() << std::endl;
+ }
+
+ return 0;
+}
+