diff options
Diffstat (limited to 'src/rgw/rgw_civetweb.cc')
| -rw-r--r-- | src/rgw/rgw_civetweb.cc | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/rgw/rgw_civetweb.cc b/src/rgw/rgw_civetweb.cc new file mode 100644 index 000000000..3607e6792 --- /dev/null +++ b/src/rgw/rgw_civetweb.cc @@ -0,0 +1,248 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab ft=cpp + +#include <string.h> +#include <string_view> + +#include <boost/algorithm/string/predicate.hpp> + +#include "civetweb/civetweb.h" +#include "rgw_civetweb.h" +#include "rgw_perf_counters.h" + + +#define dout_subsys ceph_subsys_rgw + +size_t RGWCivetWeb::write_data(const char *buf, const size_t len) +{ + size_t off = 0; + auto to_sent = len; + while (to_sent) { + const int ret = mg_write(conn, buf + off, to_sent); + if (ret < 0 || ! ret) { + /* According to the documentation of mg_write() it always returns -1 on + * error. The details aren't available, so we will just throw EIO. Same + * goes to 0 that is associated with writing to a closed connection. */ + throw rgw::io::Exception(EIO, std::system_category()); + } else { + off += static_cast<size_t>(ret); + to_sent -= static_cast<size_t>(ret); + } + } + return len; +} + +RGWCivetWeb::RGWCivetWeb(mg_connection* const conn) + : conn(conn), + explicit_keepalive(false), + explicit_conn_close(false), + got_eof_on_read(false), + txbuf(*this) +{ + sockaddr *lsa = mg_get_local_addr(conn); + switch(lsa->sa_family) { + case AF_INET: + port = ntohs(((struct sockaddr_in*)lsa)->sin_port); + break; + case AF_INET6: + port = ntohs(((struct sockaddr_in6*)lsa)->sin6_port); + break; + default: + port = -1; + } +} + +size_t RGWCivetWeb::read_data(char *buf, size_t len) +{ + size_t c; + int ret; + if (got_eof_on_read) { + return 0; + } + for (c = 0; c < len; c += ret) { + ret = mg_read(conn, buf+c, len-c); + if (ret < 0) { + throw rgw::io::Exception(EIO, std::system_category()); + } + if (!ret) { + got_eof_on_read = true; + break; + } + } + return c; +} + +void RGWCivetWeb::flush() +{ + txbuf.pubsync(); +} + +size_t RGWCivetWeb::complete_request() +{ + perfcounter->inc(l_rgw_qlen, -1); + perfcounter->inc(l_rgw_qactive, -1); + return 0; +} + +int RGWCivetWeb::init_env(CephContext *cct) +{ + env.init(cct); + const struct mg_request_info* info = mg_get_request_info(conn); + + if (! info) { + // request info is NULL; we have no info about the connection + return -EINVAL; + } + + for (int i = 0; i < info->num_headers; i++) { + const auto header = &info->http_headers[i]; + + if (header->name == nullptr || header->value==nullptr) { + lderr(cct) << "client supplied malformatted headers" << dendl; + return -EINVAL; + } + + const std::string_view name(header->name); + const auto& value = header->value; + + if (boost::algorithm::iequals(name, "content-length")) { + env.set("CONTENT_LENGTH", value); + continue; + } + if (boost::algorithm::iequals(name, "content-type")) { + env.set("CONTENT_TYPE", value); + continue; + } + if (boost::algorithm::iequals(name, "connection")) { + explicit_keepalive = boost::algorithm::iequals(value, "keep-alive"); + explicit_conn_close = boost::algorithm::iequals(value, "close"); + } + + static const std::string_view HTTP_{"HTTP_"}; + + char buf[name.size() + HTTP_.size() + 1]; + auto dest = std::copy(std::begin(HTTP_), std::end(HTTP_), buf); + for (auto src = name.begin(); src != name.end(); ++src, ++dest) { + if (*src == '-') { + *dest = '_'; + } else { + *dest = std::toupper(*src); + } + } + *dest = '\0'; + + env.set(buf, value); + } + + perfcounter->inc(l_rgw_qlen); + perfcounter->inc(l_rgw_qactive); + + env.set("REMOTE_ADDR", info->remote_addr); + env.set("REQUEST_METHOD", info->request_method); + env.set("HTTP_VERSION", info->http_version); + env.set("REQUEST_URI", info->request_uri); // get the full uri, we anyway handle abs uris later + env.set("SCRIPT_URI", info->local_uri); + if (info->query_string) { + env.set("QUERY_STRING", info->query_string); + } + if (info->remote_user) { + env.set("REMOTE_USER", info->remote_user); + } + + if (port <= 0) + lderr(cct) << "init_env: bug: invalid port number" << dendl; + char port_buf[16]; + snprintf(port_buf, sizeof(port_buf), "%d", port); + env.set("SERVER_PORT", port_buf); + if (info->is_ssl) { + env.set("SERVER_PORT_SECURE", port_buf); + } + return 0; +} + +size_t RGWCivetWeb::send_status(int status, const char *status_name) +{ + mg_set_http_status(conn, status); + + static constexpr size_t STATUS_BUF_SIZE = 128; + + char statusbuf[STATUS_BUF_SIZE]; + const auto statuslen = snprintf(statusbuf, sizeof(statusbuf), + "HTTP/1.1 %d %s\r\n", status, status_name); + + return txbuf.sputn(statusbuf, statuslen); +} + +size_t RGWCivetWeb::send_100_continue() +{ + const char HTTTP_100_CONTINUE[] = "HTTP/1.1 100 CONTINUE\r\n\r\n"; + const size_t sent = txbuf.sputn(HTTTP_100_CONTINUE, + sizeof(HTTTP_100_CONTINUE) - 1); + flush(); + return sent; +} + +size_t RGWCivetWeb::send_header(const std::string_view& name, + const std::string_view& value) +{ + static constexpr char HEADER_SEP[] = ": "; + static constexpr char HEADER_END[] = "\r\n"; + + size_t sent = 0; + + sent += txbuf.sputn(name.data(), name.length()); + sent += txbuf.sputn(HEADER_SEP, sizeof(HEADER_SEP) - 1); + sent += txbuf.sputn(value.data(), value.length()); + sent += txbuf.sputn(HEADER_END, sizeof(HEADER_END) - 1); + + return sent; +} + +size_t RGWCivetWeb::dump_date_header() +{ + char timestr[TIME_BUF_SIZE]; + + const time_t gtime = time(nullptr); + struct tm result; + struct tm const* const tmp = gmtime_r(>ime, &result); + + if (nullptr == tmp) { + return 0; + } + + if (! strftime(timestr, sizeof(timestr), + "Date: %a, %d %b %Y %H:%M:%S %Z\r\n", tmp)) { + return 0; + } + + return txbuf.sputn(timestr, strlen(timestr)); +} + +size_t RGWCivetWeb::complete_header() +{ + size_t sent = dump_date_header(); + + if (explicit_keepalive) { + constexpr char CONN_KEEP_ALIVE[] = "Connection: Keep-Alive\r\n"; + sent += txbuf.sputn(CONN_KEEP_ALIVE, sizeof(CONN_KEEP_ALIVE) - 1); + } else if (explicit_conn_close) { + constexpr char CONN_KEEP_CLOSE[] = "Connection: close\r\n"; + sent += txbuf.sputn(CONN_KEEP_CLOSE, sizeof(CONN_KEEP_CLOSE) - 1); + } + + static constexpr char HEADER_END[] = "\r\n"; + sent += txbuf.sputn(HEADER_END, sizeof(HEADER_END) - 1); + + flush(); + return sent; +} + +size_t RGWCivetWeb::send_content_length(uint64_t len) +{ + static constexpr size_t CONLEN_BUF_SIZE = 128; + + char sizebuf[CONLEN_BUF_SIZE]; + const auto sizelen = snprintf(sizebuf, sizeof(sizebuf), + "Content-Length: %" PRIu64 "\r\n", len); + return txbuf.sputn(sizebuf, sizelen); +} |