metaproxy_1::filter::CGI Class Reference

#include <filter_cgi.hpp>

Inheritance diagram for metaproxy_1::filter::CGI:

Collaboration diagram for metaproxy_1::filter::CGI:

Classes
class	Exec
class	Rep

Public Member Functions
	CGI ()
	~CGI ()
void	process (metaproxy_1::Package &package) const
void	configure (const xmlNode *ptr, bool test_only, const char *path)

Private Attributes
boost::scoped_ptr< Rep >	m_p

Detailed Description

Definition at line 28 of file filter_cgi.hpp.

Constructor & Destructor Documentation

CGI()

mp::filter::CGI::CGI

(

)

Definition at line 60 of file filter_cgi.cpp.

           : m_p(new Rep)
{
 
}

~CGI()

mp::filter::CGI::~CGI

(

)

Definition at line 74 of file filter_cgi.cpp.

{
}

Member Function Documentation

configure()

void mp::filter::CGI::configure	(	const xmlNode *	ptr,
		bool	test_only,
		const char *	path
	)

Definition at line 294 of file filter_cgi.cpp.

{
    yaz_log(YLOG_LOG, "cgi::configure path=%s", path);
    for (ptr = ptr->children; ptr; ptr = ptr->next)
    {
        if (ptr->type != XML_ELEMENT_NODE)
            continue;
        if (!strcmp((const char *) ptr->name, "map"))
        {
            CGI::Exec exec;
 
            const struct _xmlAttr *attr;
            for (attr = ptr->properties; attr; attr = attr->next)
            {
                if (!strcmp((const char *) attr->name,  "path"))
                    exec.path = mp::xml::get_text(attr->children);
                else if (!strcmp((const char *) attr->name, "exec"))
                    exec.program = mp::xml::get_text(attr->children);
                else
                    throw mp::filter::FilterException
                        ("Bad attribute "
                         + std::string((const char *) attr->name)
                         + " in cgi section");
            }
            m_p->exec_map.push_back(exec);
        }
        else if (!strcmp((const char *) ptr->name, "env"))
        {
            std::string name, value;
 
            const struct _xmlAttr *attr;
            for (attr = ptr->properties; attr; attr = attr->next)
            {
                if (!strcmp((const char *) attr->name,  "name"))
                    name = mp::xml::get_text(attr->children);
                else if (!strcmp((const char *) attr->name, "value"))
                    value = mp::xml::get_text(attr->children);
                else
                    throw mp::filter::FilterException
                        ("Bad attribute "
                         + std::string((const char *) attr->name)
                         + " in cgi section");
            }
            if (name.length() > 0)
                m_p->env_map[name] = value;
        }
        else if (!strcmp((const char *) ptr->name, "documentroot"))
        {
            m_p->documentroot = path;
        }
        else
        {
            throw mp::filter::FilterException("Bad element "
                                               + std::string((const char *)
                                                             ptr->name));
        }
    }
    if (m_p->documentroot.length() == 0)
        m_p->documentroot = ".";
}

References metaproxy_1::filter::CGI::Exec::path, and metaproxy_1::filter::CGI::Exec::program.

process()

void mp::filter::CGI::process

(

metaproxy_1::Package &

package

)

const

Definition at line 147 of file filter_cgi.cpp.

{
    Z_GDU *zgdu_req = package.request().get();
    Z_GDU *zgdu_res = 0;
 
    if (!zgdu_req || zgdu_req->which != Z_GDU_HTTP_Request)
    {
        package.move();
        return;
    }
    std::list<CGI::Exec>::const_iterator it;
    metaproxy_1::odr odr;
    Z_HTTP_Request *hreq = zgdu_req->u.HTTP_Request;
    const char *path_cstr = hreq->path;
    for (it = m_p->exec_map.begin(); it != m_p->exec_map.end(); it++)
    {
        if (strncmp(it->path.c_str(), path_cstr, it->path.length()) == 0)
        {
            int fds_response[2];
            int r = pipe(fds_response);
            if (r == -1)
            {
                zgdu_res = odr.create_HTTP_Response(
                    package.session(), hreq, 400);
                package.response() = zgdu_res;
                continue;
            }
            int fds_request[2];
            r = pipe(fds_request);
            if (r == -1)
            {
                zgdu_res = odr.create_HTTP_Response(
                    package.session(), hreq, 400);
                package.response() = zgdu_res;
                close(fds_response[0]);
                close(fds_response[1]);
                continue;
            }
 
            int status;
            pid_t pid = ::fork();
            switch (pid)
            {
            case 0: /* child */
                /* POSTed content */
                close(0);
                dup(fds_request[0]);
                close(fds_request[1]);
                /* response */
                close(1);
                close(fds_response[0]);
                dup(fds_response[1]);
                m_p->child(hreq, &(*it));
                break;
            case -1: /* error */
                close(fds_request[0]);
                close(fds_request[1]);
                close(fds_response[0]);
                close(fds_response[1]);
                zgdu_res = odr.create_HTTP_Response(
                    package.session(), hreq, 400);
                package.response() = zgdu_res;
                break;
            default: /* parent */
                close(fds_response[1]);
                close(fds_request[0]);
                if (pid)
                {
                    boost::mutex::scoped_lock lock(m_p->m_mutex);
                    m_p->children[pid] = pid;
                }
                WRBUF w = wrbuf_alloc();
                wrbuf_puts(w, "HTTP/1.1 200 OK\r\n");
                fcntl(fds_response[0], F_SETFL, O_NONBLOCK);
                fcntl(fds_request[1], F_SETFL, O_NONBLOCK);
                int no_write = 0;
                while (1)
                {
                    int num = 1;
                    struct yaz_poll_fd fds[2];
                    fds[0].fd = fds_response[0];
                    fds[0].input_mask = yaz_poll_read;
                    if (no_write < hreq->content_len)
                    {
                        fds[1].fd = fds_request[1];
                        fds[1].input_mask = yaz_poll_write;
                        num = 2;
                    }
                    int r = yaz_poll(fds, num, 60, 0);
                    if (r <= 0)
                        break;
                    if (fds[0].output_mask & (yaz_poll_read|yaz_poll_except))
                    {
                        char buf[512];
                        ssize_t rd = read(fds_response[0], buf, sizeof buf);
                        if (rd <= 0)
                            break;
                        wrbuf_write(w, buf, rd);
                    }
                    if (num == 2 && fds[1].output_mask & yaz_poll_write)
                    {
                        ssize_t wd = write(fds_request[1],
                                           hreq->content_buf + no_write,
                                           hreq->content_len - no_write);
                        if (wd <= 0)
                            break;
                        no_write += wd;
                    }
                }
                close(fds_request[1]);
                close(fds_response[0]);
                waitpid(pid, &status, 0);
 
                if (pid)
                {
                    boost::mutex::scoped_lock lock(m_p->m_mutex);
                    m_p->children.erase(pid);
                }
                ODR dec = odr_createmem(ODR_DECODE);
                odr_setbuf(dec, wrbuf_buf(w), wrbuf_len(w), 0);
                r = z_GDU(dec, &zgdu_res, 0, 0);
                if (r && zgdu_res)
                {
                    package.response() = zgdu_res;
                }
                else
                {
                    zgdu_res = odr.create_HTTP_Response(
                        package.session(), zgdu_req->u.HTTP_Request, 400);
                    Z_HTTP_Response *hres = zgdu_res->u.HTTP_Response;
                    z_HTTP_header_add(odr, &hres->headers,
                                      "Content-Type", "text/plain");
                    hres->content_buf =
                        odr_strdup(odr, "Invalid script from script");
                    hres->content_len = strlen(hres->content_buf);
                }
                package.response() = zgdu_res;
                odr_destroy(dec);
                wrbuf_destroy(w);
                break;
            }
            return;
        }
    }
    package.move();
}

Member Data Documentation

m_p

boost::scoped_ptr<Rep> metaproxy_1::filter::CGI::m_p

private

Definition at line 31 of file filter_cgi.hpp.

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

• filter_cgi.hpp
• filter_cgi.cpp