293 lines
10 KiB
D
293 lines
10 KiB
D
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Long: write-out
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Short: w
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Arg: <format>
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Help: Use output FORMAT after completion
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Category: verbose
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Example: -w '%{response_code}\\n' $URL
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Added: 6.5
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See-also: verbose head
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Multi: single
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---
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Make curl display information on stdout after a completed transfer. The format
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is a string that may contain plain text mixed with any number of
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variables. The format can be specified as a literal "string", or you can have
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curl read the format from a file with "@filename" and to tell curl to read the
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format from stdin you write "@-".
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The variables present in the output format are substituted by the value or
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text that curl thinks fit, as described below. All variables are specified as
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%{variable_name} and to output a normal % you just write them as %%. You can
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output a newline by using \\n, a carriage return with \\r and a tab space with
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\\t.
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The output is by default written to standard output, but can be changed with
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%{stderr} and %output{}.
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Output HTTP headers from the most recent request by using *%header{name}*
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where *name* is the case insensitive name of the header (without the trailing
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colon). The header contents are exactly as sent over the network, with leading
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and trailing whitespace trimmed (added in 7.84.0).
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Select a specific target destination file to write the output to, by using
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*%output{name}* (added in curl 8.3.0) where *name* is the full file name. The
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output following that instruction is then written to that file. More than one
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*%output{}* instruction can be specified in the same write-out argument. If
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the file name cannot be created, curl leaves the output destination to the one
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used prior to the *%output{}* instruction. Use *%output{>>name}* to append
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data to an existing file.
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**NOTE:**
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In Windows the %-symbol is a special symbol used to expand environment
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variables. In batch files all occurrences of % must be doubled when using this
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option to properly escape. If this option is used at the command prompt then
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the % cannot be escaped and unintended expansion is possible.
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The variables available are:
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.RS
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.TP 15
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**certs**
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Output the certificate chain with details. Supported only by the OpenSSL,
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GnuTLS, Schannel and Secure Transport backends. (Added in 7.88.0)
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.TP
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**content_type**
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The Content-Type of the requested document, if there was any.
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.TP
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**errormsg**
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The error message. (Added in 7.75.0)
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.TP
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**exitcode**
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The numerical exit code of the transfer. (Added in 7.75.0)
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.TP
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**filename_effective**
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The ultimate filename that curl writes out to. This is only meaningful if curl
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is told to write to a file with the --remote-name or --output
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option. It's most useful in combination with the --remote-header-name
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option. (Added in 7.26.0)
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.TP
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**ftp_entry_path**
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The initial path curl ended up in when logging on to the remote FTP
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server. (Added in 7.15.4)
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.TP
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**header_json**
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A JSON object with all HTTP response headers from the recent transfer. Values
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are provided as arrays, since in the case of multiple headers there can be
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multiple values. (Added in 7.83.0)
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The header names provided in lowercase, listed in order of appearance over the
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wire. Except for duplicated headers. They are grouped on the first occurrence
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of that header, each value is presented in the JSON array.
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.TP
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**http_code**
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The numerical response code that was found in the last retrieved HTTP(S) or
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FTP(s) transfer.
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.TP
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**http_connect**
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The numerical code that was found in the last response (from a proxy) to a
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curl CONNECT request. (Added in 7.12.4)
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.TP
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**http_version**
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The http version that was effectively used. (Added in 7.50.0)
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.TP
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**json**
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A JSON object with all available keys. (Added in 7.70.0)
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.TP
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**local_ip**
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The IP address of the local end of the most recently done connection - can be
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either IPv4 or IPv6. (Added in 7.29.0)
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.TP
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**local_port**
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The local port number of the most recently done connection. (Added in 7.29.0)
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.TP
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**method**
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The http method used in the most recent HTTP request. (Added in 7.72.0)
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.TP
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**num_certs**
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Number of server certificates received in the TLS handshake. Supported only by
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the OpenSSL, GnuTLS, Schannel and Secure Transport backends.
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(Added in 7.88.0)
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.TP
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**num_connects**
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Number of new connects made in the recent transfer. (Added in 7.12.3)
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.TP
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**num_headers**
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The number of response headers in the most recent request (restarted at each
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redirect). Note that the status line IS NOT a header. (Added in 7.73.0)
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.TP
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**num_redirects**
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Number of redirects that were followed in the request. (Added in 7.12.3)
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.TP
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**onerror**
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The rest of the output is only shown if the transfer returned a non-zero error.
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(Added in 7.75.0)
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.TP
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**proxy_ssl_verify_result**
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The result of the HTTPS proxy's SSL peer certificate verification that was
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requested. 0 means the verification was successful. (Added in 7.52.0)
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.TP
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**redirect_url**
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When an HTTP request was made without --location to follow redirects (or when
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--max-redirs is met), this variable shows the actual URL a redirect
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*would* have gone to. (Added in 7.18.2)
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.TP
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**referer**
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The Referer: header, if there was any. (Added in 7.76.0)
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.TP
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**remote_ip**
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The remote IP address of the most recently done connection - can be either
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IPv4 or IPv6. (Added in 7.29.0)
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.TP
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**remote_port**
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The remote port number of the most recently done connection. (Added in 7.29.0)
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.TP
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**response_code**
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The numerical response code that was found in the last transfer (formerly
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known as "http_code"). (Added in 7.18.2)
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.TP
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**scheme**
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The URL scheme (sometimes called protocol) that was effectively used. (Added in 7.52.0)
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.TP
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**size_download**
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The total amount of bytes that were downloaded. This is the size of the
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body/data that was transferred, excluding headers.
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.TP
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**size_header**
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The total amount of bytes of the downloaded headers.
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.TP
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**size_request**
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The total amount of bytes that were sent in the HTTP request.
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.TP
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**size_upload**
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The total amount of bytes that were uploaded. This is the size of the
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body/data that was transferred, excluding headers.
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.TP
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**speed_download**
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The average download speed that curl measured for the complete download. Bytes
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per second.
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.TP
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**speed_upload**
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The average upload speed that curl measured for the complete upload. Bytes per
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second.
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.TP
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**ssl_verify_result**
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The result of the SSL peer certificate verification that was requested. 0
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means the verification was successful. (Added in 7.19.0)
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.TP
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**stderr**
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From this point on, the --write-out output is written to standard
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error. (Added in 7.63.0)
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.TP
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**stdout**
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From this point on, the --write-out output is written to standard output.
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This is the default, but can be used to switch back after switching to stderr.
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(Added in 7.63.0)
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.TP
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**time_appconnect**
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The time, in seconds, it took from the start until the SSL/SSH/etc
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connect/handshake to the remote host was completed. (Added in 7.19.0)
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.TP
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**time_connect**
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The time, in seconds, it took from the start until the TCP connect to the
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remote host (or proxy) was completed.
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.TP
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**time_namelookup**
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The time, in seconds, it took from the start until the name resolving was
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completed.
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.TP
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**time_pretransfer**
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The time, in seconds, it took from the start until the file transfer was just
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about to begin. This includes all pre-transfer commands and negotiations that
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are specific to the particular protocol(s) involved.
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.TP
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**time_redirect**
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The time, in seconds, it took for all redirection steps including name lookup,
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connect, pretransfer and transfer before the final transaction was
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started. time_redirect shows the complete execution time for multiple
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redirections. (Added in 7.12.3)
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.TP
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**time_starttransfer**
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The time, in seconds, it took from the start until the first byte is received.
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This includes time_pretransfer and also the time the server needed to calculate
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the result.
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.TP
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**time_total**
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The total time, in seconds, that the full operation lasted.
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.TP
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**url**
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The URL that was fetched. (Added in 7.75.0)
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.TP
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**url.scheme**
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The scheme part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.user**
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The user part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.password**
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The password part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.options**
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The options part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.host**
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The host part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.port**
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The port number of the URL that was fetched. If no port number was specified,
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but the URL scheme is known, that scheme's default port number is
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shown. (Added in 8.1.0)
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.TP
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**url.path**
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The path part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.query**
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The query part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.fragment**
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The fragment part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**url.zoneid**
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The zone id part of the URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.scheme**
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The scheme part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.user**
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The user part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.password**
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The password part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.options**
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The options part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.host**
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The host part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.port**
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The port number of the effective (last) URL that was fetched. If no port
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number was specified, but the URL scheme is known, that scheme's default port
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number is shown. (Added in 8.1.0)
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.TP
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**urle.path**
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The path part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.query**
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The query part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.fragment**
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The fragment part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urle.zoneid**
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The zone id part of the effective (last) URL that was fetched. (Added in 8.1.0)
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.TP
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**urlnum**
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The URL index number of this transfer, 0-indexed. Unglobbed URLs share the
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same index number as the origin globbed URL. (Added in 7.75.0)
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.TP
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**url_effective**
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The URL that was fetched last. This is most meaningful if you have told curl
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to follow location: headers.
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.RE
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.IP
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