diff options
Diffstat (limited to 'lib/libfetch/http.c')
| -rw-r--r-- | lib/libfetch/http.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/lib/libfetch/http.c b/lib/libfetch/http.c index 39a8cfaa..dd98349 100644 --- a/lib/libfetch/http.c +++ b/lib/libfetch/http.c @@ -63,6 +63,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/socket.h> +#include <sys/time.h> #include <ctype.h> #include <err.h> @@ -92,6 +93,7 @@ __FBSDID("$FreeBSD$"); #define HTTP_MOVED_PERM 301 #define HTTP_MOVED_TEMP 302 #define HTTP_SEE_OTHER 303 +#define HTTP_NOT_MODIFIED 304 #define HTTP_TEMP_REDIRECT 307 #define HTTP_NEED_AUTH 401 #define HTTP_NEED_PROXY_AUTH 407 @@ -797,20 +799,23 @@ FILE * http_request(struct url *URL, const char *op, struct url_stat *us, struct url *purl, const char *flags) { + char timebuf[80]; + char hbuf[MAXHOSTNAMELEN + 7], *host; conn_t *conn; struct url *url, *new; - int chunked, direct, need_auth, noredirect, verbose; + int chunked, direct, ims, need_auth, noredirect, verbose; int e, i, n, val; off_t offset, clength, length, size; time_t mtime; const char *p; FILE *f; hdr_t h; - char hbuf[MAXHOSTNAMELEN + 7], *host; + struct tm *timestruct; direct = CHECK_FLAG('d'); noredirect = CHECK_FLAG('A'); verbose = CHECK_FLAG('v'); + ims = CHECK_FLAG('i'); if (direct && purl) { fetchFreeURL(purl); @@ -879,6 +884,14 @@ http_request(struct url *URL, const char *op, struct url_stat *us, op, url->doc); } + if (ims && url->ims_time) { + timestruct = gmtime((time_t *)&url->ims_time); + (void)strftime(timebuf, 80, "%a, %d %b %Y %T GMT", + timestruct); + if (verbose) + fetch_info("If-Modified-Since: %s", timebuf); + http_cmd(conn, "If-Modified-Since: %s", timebuf); + } /* virtual host */ http_cmd(conn, "Host: %s", host); @@ -940,6 +953,7 @@ http_request(struct url *URL, const char *op, struct url_stat *us, switch (http_get_reply(conn)) { case HTTP_OK: case HTTP_PARTIAL: + case HTTP_NOT_MODIFIED: /* fine */ break; case HTTP_MOVED_PERM: @@ -1074,7 +1088,10 @@ http_request(struct url *URL, const char *op, struct url_stat *us, } /* we have a hit or an error */ - if (conn->err == HTTP_OK || conn->err == HTTP_PARTIAL || HTTP_ERROR(conn->err)) + if (conn->err == HTTP_OK + || conn->err == HTTP_NOT_MODIFIED + || conn->err == HTTP_PARTIAL + || HTTP_ERROR(conn->err)) break; /* all other cases: we got a redirect */ @@ -1102,6 +1119,11 @@ http_request(struct url *URL, const char *op, struct url_stat *us, (long long)offset, (long long)length, (long long)size, (long long)clength)); + if (conn->err == HTTP_NOT_MODIFIED) { + http_seterr(HTTP_NOT_MODIFIED); + return (NULL); + } + /* check for inconsistencies */ if (clength != -1 && length != -1 && clength != length) { http_seterr(HTTP_PROTOCOL_ERROR); |
