Exit Print View. Search Scope:. This Document Entire Library. The command is designed to work without user interaction. As you will see below, the number of features will make your head spin! See libcurl 3 for details. You'll find a detailed descrip- tion in RFC They will be fetched in a sequential manner in the specified order.
It will then default to HTTP but try other protocols based on often-used host name prefixes. For exam- ple, for host names starting with "ftp. It is not trying to validate it as a syntactically correct URL by any means but is instead very liberal with what it accepts. This improves speed. Of course this is only done on files specified on a single command line and cannot be used between separate curl invokes.
It is not the same case for FTP upload as that operation does not spit out any response data to the terminal. If you prefer a progress "bar" instead of the regular meter, - is your friend. Many of the options require an how to break a family curse value next to them.
The short "single-dash" form of the options, -d for example, may be used with or without a space between it and its value, although a space is a recommended separator. The long "double-dash" form, --data for example, requires a space between it and its value.STRAIGHT TO CURLY HAIR! (No Heat)
Short version options that don't need any additional values can be used immediately next to each other, like for example you can specify all the options -O, -L and -v at once as -OLv. In general, all boolean options are enabled with --option and yet again disabled with --no-option. That is, you use the exact same option name but prefix it with "no-".
However, in this list we mostly only list and show the --option version of them. This concept with --no options was added in 7. This allows you to send several URL requests, each with their own specific options, for example, such as different user names or custom requests for each. Added in 7. This is the internal default version.
This requires that the underlying libcurl was built to support it. You can use options --tlsv1. Sometimes curl is built without SSLv2 sup- port. Sometimes curl is built without SSLv3 sup- port. If the remote file doesn't exist, it will be created. To encode blanks in the string, surround the string with single quote marks.
This can also be set with the -H, --header option of course. If this option is used several times, the last one will be used. This is done by first doing a request and checking the response- headers, thus possibly inducing an extra network round-trip.
This is used instead of setting a specific authentication method, which you can do with --basic, --digest, --ntlm, and --negotiate. Note that using --anyauth is not recommended if you do uploads from stdin, since it may require data to be sent twice and then the client must be able to rewind. If the need should arise when uploading from stdin, the upload operation will fail.
curl(1) - Linux man page
It is sup- posedly the data previously received from the server in a "Set- Cookie:" line. Using this method also activates the cookie engine which will make curl record incoming cookies too, which may be handy if you're using this in combination with the -L, --location option.Details provided below.
Can use --create-dirs in conjunction with this to create any directories specified in the -o path. Use with -S to force it to show errors. See man page for more details on available variables. Many APIs will accept both formats, so if you're using curl at the command line, it can be a bit easier to use the form urlencoded format instead of json because.
This gist provides examples for using both formats, including how to use sample data files in either format with your curl requests. While running the following command from cmd. It gives the error as '-d' is not recognized as an internal or external command, operable program or batch file. I felt if curl provide any simple solution with out writing a script for making this happen.
It was necessary to escape the quotes in the submitted JSON:. I don't konw how to post data also with payload image data. I use fastcgi do the server part. Vanshita you might have not set the pathset the environment path and try.
Excuse me I am getting the following error, syntaxerror: unexpected token in json at position 0 at object. If your API endpoint can only accept one at a single time, then you can write a bash script that traverses your json array and throws a curl command for each one of them. Other languages besides bash are more "pretty" for doing this task, like Ruby or Python.
Just discovered something that others might also find surprising. If you want to push up some space-significant stuff like YAML, then -d is not your friend. Use --data-binary instead of --data-ascii - otherwise it strips out linefeeds. Thanks,very informative. In fact you shouldn't use it at all. AaronBaldwin Thanks. How do I do it? Good luck! The advantage of using -T is that you can stream read which in the case of a file descriptor is immensely useful if you don't know the length, whereas --data and --data file will read the entire contents of the file into a buffer in memory before the POST is sent, but -T reads however many bytes the internal read callback expects and asynchronously begins writing, hence why this is a very dirty hack.
I don't know if this behavior was ever actually intended, I should probably e-mail the haxx list one of these days and find out for sure. Thanks for your response.Simply curl or command-line tool and library for transferring data with URLs.
Below are the protocols currently supported by curl. Keep your breath because there are a lot of examples about curl where we look at them one by one. In the previous example, the downloaded file is printed out the standard output which is our terminal. But this is generally not a practical usage. The downloaded file can be redirected to a file with a bash redirect feature like below.
In this example, we can see some statistical information about the download. This information provides total size, received, average download speed, total time and times spend for download. There is a parameter used to save the downloaded file into a file with no extra command. This parameter is -o. Another useful feature of curl is limiting download rate. This can be very useful in situations where there is limited internet bandwidth and it should be shared with other applications.
In this examples, we have limited bandwidth to 1K and this will make our download take some time. System administrators generally prefer using sequential file names for backups or similar operations.
So downloading them one by one specifying the full name of the file is drudgery work. SSL has a different version where this may create incompatible situations. While downloading and uploading files with curl there will be operations that occur background. There will be also problems that we can not know what is happening. There is another mode where there will be no output to the terminal. This can be used for clean download.
While using authentication required protocols and servers curl can provide these credentials like username and password. As we know HTTP is a stateless protocol.Anyone engaging in a resistance-training program will benefit from being aware of how much weight they should use for different types of lifts. However, differences in body type, muscle structure and training experience lead to differences in ability to curl weight.
While using your body weight to determine how much you should be curling is a decent rule of thumb, max weight should take the background of the lifter into consideration. Furthermore, focusing on form is more important for hitting your biceps and preventing injury. Thus, before you consider how much you should be curling, you should know how to curl properly. Grasp a barbell with an underhand grip and let your arms hang down in front of you. Your hands should be spaced shoulder-width apart. This is the starting position.
Bend your elbows upward to lift the weight, keeping your back straight, until the barbell touches your chest. You may bend your wrists forward when you reach the top. Return the barbell to the starting position. This is the standard curl that most exercisers are familiar with. You can perform a dumbbell curl in the same way, using each arm independently. The true answer to how much weight you should be curling relative to your body weight will be disappointing to most.
Here it is: Curling weight and body weight have little relation. The curl is performed by the muscles in your upper arms, mainly the biceps and the brachialis. That said, muscle growth occurs all over when you engage in resistance training due to the release of human growth hormone. So a correlation between body weight and curling weight is possible.
But it still depends on how often you work your biceps more than how heavy you are. Assuming that you fall into a normal level of body fat percentage for your age, you can base how much you should be able to curl on a percentage of your body weight. A man at between and percent body fat, for example, can typically curl around half his body weight with the barbell curl as a one-rep max, and one-fourth his body weight with the dumbbell curl as a one-rep max.
So a pound man with a healthy body should be able to curl approximately 70 pounds on a barbell as his one-rep max and 35 pounds on a dumbbell as his one-rep max.
Having obtained a Master of Science in psychology in East Asia, Damon Verial has been applying his knowledge to related topics since Having written professionally sincehe has been featured in financial publications such as SafeHaven and the McMillian Portfolio. He also runs a financial newsletter at Stock Barometer. By: Damon Verial. Published: 14 August, Get a web page and store in a local file, make the local file get the name of the remote document if no file name part is specified in the URL, this will fail :.
This is similar to FTP, but you can use the --key option to specify a private key to use instead of a password. Note that the private key may itself be protected by a password that is unrelated to the login password of the remote system; this password is specified using the --pass option.
Typically, curl will automatically extract the public key from the private key file, but in cases where curl does not have the proper library support, a matching public key file must be specified using the --pubkey option. Without telling which method to use, curl defaults to Basic.
You can also ask curl to pick the most secure ones out of the ones that the server accepts for the given URL, by using --anyauth. When using a proxy, you must use the -u style for user and password.
It does not have special support for FTP proxy servers since there are no standards for those, but it can still be made to work with many of them. If the proxy is specified with --proxy1. See the manual for your FTP proxy to determine the form it expects to set up transfers, and curl's -v option to see exactly what curl is sending. HTTP 1. Using this, a client can request to get only one or more subparts of a specified document. Curl supports this with the -r flag.
Curl also supports simple ranges for FTP files as well. Then you can only specify start and stop position.
Curl also supports ftp upload through a proxy, but only if the proxy is configured to allow that kind of tunneling. If it does, you can run curl in a fashion similar to:. If curl fails where it isn't supposed to, if the servers don't let you in, if you can't understand the responses: use the -v flag to get verbose fetching. Curl will output lots of info and what it sends and receives in order to let the user see all client-server interaction but it won't show you the actual data.
To get even more details and information on what curl does, try using the --trace or --trace-ascii options with a given file name to log to, like this:. The HTTP information is a lot more extensive.GNU Wget is a free utility for non-interactive download of files from the Web. Wget will simply download all the URL s specified on the command line. However, you may wish to change some of the default parameters of Wget.
You can do it two ways: permanently, adding the appropriate command to. A uniform resource locator is a compact string representation for a resource available via the Internet. This is the most widely used form square brackets denote optional parts :. Either user or passwordor both, may be left out. If you leave out either the HTTP username or password, no authentication will be sent.
If you leave out the FTP password, your email address will be supplied as a default password. Important Note : if you specify a password-containing URL on the command line, the username and password will be plainly visible to all users on the system, by way of ps. On multi-user systems, this is a big security risk. Refer to RFC for a comprehensive list of unsafe characters. Here is an example:.
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Two alternative variants of URL specification are also supported, because of historical hysterical? If you do not understand the difference between these notations, or do not know which one to use, just use the plain ordinary format you use with your favorite browser, like Lynx or Netscape.
Since Wget uses GNU getopt to process command-line arguments, every option has a long form along with the short one. Long options are more convenient to remember, but take time to type.
You may freely mix different option styles, or specify options after the command-line arguments. Thus you may write:. The space between the option accepting an argument and the argument may be omitted. The options that accept comma-separated lists all respect the convention that specifying an empty list clears its value.As you will see below, the number of features will make your head spin!
See libcurl 3 for details. Nested sequences are not supported, but you can use several ones next to each other:. You can specify any amount of URLs on the command line. They will be fetched in a sequential manner in the specified order.
Like in. It will then default to HTTP but try other protocols based on often-used host name prefixes. For example, for host names starting with "ftp. It is not trying to validate it as a syntactically correct URL by any means but is instead very liberal with what it accepts. This improves speed. Of course this is only done on files specified on a single command line and cannot be used between separate curl invokes.
It is not the same case for FTP upload as that operation does not spit out any response data to the terminal. If you prefer a progress "bar" instead of the regular meter, ---progress-bar is your friend.
The short "single-dash" form of the options, -d for example, may be used with or without a space between it and its value, although a space is a recommended separator. The long "double-dash" form, -d, --data for example, requires a space between it and its value. Short version options that don't need any additional values can be used immediately next to each other, like for example you can specify all the options -O, -L and -v at once as -OLv. In general, all boolean options are enabled with -- option and yet again disabled with -- no- option.
That is, you use the exact same option name but prefix it with "no-". However, in this list we mostly only list and show the --option version of them. This concept with --no options was added in 7. Using --anyauth is not recommended if you do uploads from stdin, since it may require data to be sent twice and then the client must be able to rewind.
If the need should arise when uploading from stdin, the upload operation will fail. This option overrides that variable. If the option is not set, then curl will use the certificates in the system and user Keychain to verify the peer, which is the preferred method of verifying the peer's certificate chain.
If this option is set, the default capath value will be ignored, and if it is used several times, the last one will be used. If this option is enabled and the server sends an invalid e. If you want to use a file from the current directory, please precede it with ". Options and their parameters must be specified on the same config file line, separated by whitespace, colon, or the equals sign.
Long option names can optionally be given in the config file without the initial double dashes and if so, the colon or equals characters can be used as separators. If the option is specified with one or two dashes, there can be no colon or equals character between the option and its parameter. If the parameter is to contain whitespace, the parameter must be enclosed within quotes.
A backslash preceding any other letter is ignored. If the first column of a config line is a ' ' character, the rest of the line will be treated as a comment. Only write one option per physical line in the config file. Specify the filename to -K, --config as '-' to make curl read the file from stdin. Note that to be able to specify a URL in the config file, you need to specify it using the --url option, and not by simply writing the URL on its own line.
So, it could look similar to this:. When curl is invoked, it always unless -q, --disable is used checks for a default config file and uses it if found.