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authorZenju <zenju@gmx.de>2019-09-19 14:59:13 +0200
committerDaniel Stenberg <daniel@haxx.se>2019-09-21 16:23:03 +0200
commit36ff5e37b93703fffc4d0a6fc7e355963b524912 (patch)
tree3753f5c1d2bd2625268603a101bb49c96d06dc61 /lib
parent0801343e27d4540afcdbbd8fe46aabaddd9da321 (diff)
FTP: FTPFILE_NOCWD: avoid redundant CWDs
Closes #4382
Diffstat (limited to 'lib')
-rw-r--r--lib/ftp.c116
-rw-r--r--lib/ftp.h5
2 files changed, 62 insertions, 59 deletions
diff --git a/lib/ftp.c b/lib/ftp.c
index d057a0a61..33d9be45e 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -867,6 +867,10 @@ static CURLcode ftp_state_cwd(struct connectdata *conn)
/* already done and fine */
result = ftp_state_mdtm(conn);
else {
+ /* FTPFILE_NOCWD with full path: expect ftpc->cwddone! */
+ DEBUGASSERT((conn->data->set.ftp_filemethod != FTPFILE_NOCWD) ||
+ !(ftpc->dirdepth && ftpc->dirs[0][0] == '/'));
+
ftpc->count2 = 0; /* count2 counts failed CWDs */
/* count3 is set to allow a MKD to fail once. In the case when first CWD
@@ -874,12 +878,9 @@ static CURLcode ftp_state_cwd(struct connectdata *conn)
dir) this then allows for a second try to CWD to it */
ftpc->count3 = (conn->data->set.ftp_create_missing_dirs == 2)?1:0;
- if((conn->data->set.ftp_filemethod == FTPFILE_NOCWD) && !ftpc->cwdcount)
- /* No CWD necessary */
- result = ftp_state_mdtm(conn);
- else if(conn->bits.reuse && ftpc->entrypath &&
- /* no need to go to entrypath when we have an absolute path */
- !(ftpc->dirdepth && ftpc->dirs[0][0] == '/')) {
+ if(conn->bits.reuse && ftpc->entrypath &&
+ /* no need to go to entrypath when we have an absolute path */
+ !(ftpc->dirdepth && ftpc->dirs[0][0] == '/')) {
/* This is a re-used connection. Since we change directory to where the
transfer is taking place, we must first get back to the original dir
where we ended up after login: */
@@ -1438,8 +1439,7 @@ static CURLcode ftp_state_list(struct connectdata *conn)
servers either... */
/*
- if FTPFILE_NOCWD was specified, we are currently in
- the user's home directory, so we should add the path
+ if FTPFILE_NOCWD was specified, we should add the path
as argument for the LIST / NLST / or custom command.
Whether the server will support this, is uncertain.
@@ -3133,6 +3133,7 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
int ftpcode;
CURLcode result = CURLE_OK;
char *path = NULL;
+ size_t pathlen = 0;
if(!ftp)
return CURLE_OK;
@@ -3170,9 +3171,6 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
break;
}
- /* now store a copy of the directory we are in */
- free(ftpc->prevpath);
-
if(data->state.wildcardmatch) {
if(data->set.chunk_end && ftpc->file) {
Curl_set_in_callback(data, true);
@@ -3184,40 +3182,40 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
if(!result)
/* get the "raw" path */
- result = Curl_urldecode(data, ftp->path, 0, &path, NULL, TRUE);
+ result = Curl_urldecode(data, ftp->path, 0, &path, &pathlen, TRUE);
if(result) {
/* We can limp along anyway (and should try to since we may already be in
* the error path) */
ftpc->ctl_valid = FALSE; /* mark control connection as bad */
connclose(conn, "FTP: out of memory!"); /* mark for connection closure */
+ free(ftpc->prevpath);
ftpc->prevpath = NULL; /* no path remembering */
}
- else {
- size_t flen = ftpc->file?strlen(ftpc->file):0; /* file is "raw" already */
- size_t dlen = strlen(path)-flen;
- if(!ftpc->cwdfail) {
- ftpc->prevmethod = data->set.ftp_filemethod;
- if(dlen && (data->set.ftp_filemethod != FTPFILE_NOCWD)) {
+ else { /* remember working directory for connection reuse */
+ if((data->set.ftp_filemethod == FTPFILE_NOCWD) && (path[0] == '/'))
+ free(path); /* full path => no CWDs happened => keep ftpc->prevpath */
+ else {
+ free(ftpc->prevpath);
+
+ if(!ftpc->cwdfail) {
+ if(data->set.ftp_filemethod == FTPFILE_NOCWD)
+ pathlen = 0; /* relative path => working directory is FTP home */
+ else
+ pathlen -= ftpc->file?strlen(ftpc->file):0; /* file is url-decoded */
+
+ path[pathlen] = '\0';
ftpc->prevpath = path;
- if(flen)
- /* if 'path' is not the whole string */
- ftpc->prevpath[dlen] = 0; /* terminate */
}
else {
free(path);
- /* we never changed dir */
- ftpc->prevpath = strdup("");
- if(!ftpc->prevpath)
- return CURLE_OUT_OF_MEMORY;
+ ftpc->prevpath = NULL; /* no path */
}
- if(ftpc->prevpath)
- infof(data, "Remembering we are in dir \"%s\"\n", ftpc->prevpath);
- }
- else {
- ftpc->prevpath = NULL; /* no path */
- free(path);
}
+
+ if(ftpc->prevpath)
+ infof(data, "Remembering we are in dir \"%s\"\n", ftpc->prevpath);
}
+
/* free the dir tree and file parts */
freedirs(ftpc);
@@ -4093,6 +4091,9 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
const char *path_to_use = ftp->path;
const char *cur_pos;
const char *filename = NULL;
+ char *path = NULL;
+ size_t pathlen = 0;
+ CURLcode result = CURLE_OK;
cur_pos = path_to_use; /* current position in path. point at the begin of
next path component */
@@ -4134,7 +4135,6 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
slash_pos = strrchr(cur_pos, '/');
if(slash_pos || !*cur_pos) {
size_t dirlen = slash_pos-cur_pos;
- CURLcode result;
ftpc->dirs = calloc(1, sizeof(ftpc->dirs[0]));
if(!ftpc->dirs)
@@ -4185,10 +4185,9 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
CWD requires a parameter and a non-existent parameter a) doesn't
work on many servers and b) has no effect on the others. */
size_t len = slash_pos - cur_pos + absolute_dir;
- CURLcode result =
- Curl_urldecode(conn->data, cur_pos - absolute_dir, len,
- &ftpc->dirs[ftpc->dirdepth], NULL,
- TRUE);
+ result = Curl_urldecode(conn->data, cur_pos - absolute_dir, len,
+ &ftpc->dirs[ftpc->dirdepth], NULL,
+ TRUE);
if(result) {
freedirs(ftpc);
return result;
@@ -4227,8 +4226,7 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
} /* switch */
if(filename && *filename) {
- CURLcode result =
- Curl_urldecode(conn->data, filename, 0, &ftpc->file, NULL, TRUE);
+ result = Curl_urldecode(conn->data, filename, 0, &ftpc->file, NULL, TRUE);
if(result) {
freedirs(ftpc);
@@ -4247,27 +4245,33 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
ftpc->cwddone = FALSE; /* default to not done */
- if(ftpc->prevpath) {
- /* prevpath is "raw" so we convert the input path before we compare the
- strings */
- size_t dlen;
- char *path;
- CURLcode result =
- Curl_urldecode(conn->data, ftp->path, 0, &path, &dlen, TRUE);
- if(result) {
- freedirs(ftpc);
- return result;
- }
+ /* prevpath and ftpc->file are url-decoded so convert the input path
+ before we compare the strings */
+ result = Curl_urldecode(conn->data, ftp->path, 0, &path, &pathlen, TRUE);
+ if(result) {
+ freedirs(ftpc);
+ return result;
+ }
+
+ if((data->set.ftp_filemethod == FTPFILE_NOCWD) && (path[0] == '/'))
+ ftpc->cwddone = TRUE; /* skip CWD for absolute paths */
+ else { /* newly created FTP connections are already in entry path */
+ const char *oldpath = conn->bits.reuse ? ftpc->prevpath : "";
+ if(oldpath) {
+ if(data->set.ftp_filemethod == FTPFILE_NOCWD)
+ pathlen = 0; /* CWD to entry for relative paths */
+ else
+ pathlen -= ftpc->file?strlen(ftpc->file):0;
+
+ path[pathlen] = '\0';
- dlen -= ftpc->file?strlen(ftpc->file):0;
- if((dlen == strlen(ftpc->prevpath)) &&
- !strncmp(path, ftpc->prevpath, dlen) &&
- (ftpc->prevmethod == data->set.ftp_filemethod)) {
- infof(data, "Request has same path as previous transfer\n");
- ftpc->cwddone = TRUE;
+ if(!strcmp(path, oldpath)) {
+ infof(data, "Request has same path as previous transfer\n");
+ ftpc->cwddone = TRUE;
+ }
}
- free(path);
}
+ free(path);
return CURLE_OK;
}
diff --git a/lib/ftp.h b/lib/ftp.h
index 828d69a21..3bdf52031 100644
--- a/lib/ftp.h
+++ b/lib/ftp.h
@@ -122,7 +122,7 @@ struct ftp_conn {
char **dirs; /* realloc()ed array for path components */
int dirdepth; /* number of entries used in the 'dirs' array */
int diralloc; /* number of entries allocated for the 'dirs' array */
- char *file; /* decoded file */
+ char *file; /* url-decoded file name (or path) */
bool dont_check; /* Set to TRUE to prevent the final (post-transfer)
file size and 226/250 status check. It should still
read the line, just ignore the result. */
@@ -135,8 +135,7 @@ struct ftp_conn {
bool cwdfail; /* set TRUE if a CWD command fails, as then we must prevent
caching the current directory */
bool wait_data_conn; /* this is set TRUE if data connection is waited */
- char *prevpath; /* conn->path from the previous transfer */
- curl_ftpfile prevmethod; /* ftp method in previous transfer */
+ char *prevpath; /* url-decoded conn->path from the previous transfer */
char transfertype; /* set by ftp_transfertype for use by Curl_client_write()a
and others (A/I or zero) */
int count1; /* general purpose counter for the state machine */