02/16/2006 Jeff Felling

Curl will help you manage data hosted on the Web. This article discusses the free Curl tool, which can be used to send and receive Web pages from command line. Curl makes it easy to automate many

Curl will help you manage your data on the Web

This article looks at a free tool called Curl that lets you send and receive Web pages from the command line. Curl makes it easy to automate many security and administrative tasks, such as extracting a Web page for analysis or downloading a security patch from the Web.

Curl installation

Curl is included with many Unix distributions. Binaries and sources available for most others operating systems. Even programmers working with open PHP, can use Curl to securely access Web content directly from PHP scripts.

Curl requires the OpenSSL package to work with Secure Sockets Layer (SSL) Web sites. There are two versions of Curl: one with SSL and one without SSL. I recommend the first one, since SSL reliably protects data.

Before you can use Curl with SSL functionality, you must download and separately install the OpenSSL package. OpenSSL binaries for Windows can be downloaded from the GnuWin32 SourceForge project site at . There are many other useful tools on this site that have been ported to Windows.

You should download and install the OpenSSL package, then copy the two DLL files to the system32 directory:

Copy "C:Program FilesGnuWin32 binlibeay32.dll" %windir%system32 copy "C:Program FilesGnuWin32 binlibssl32.dll" %windir%system32

After this you can install Curl. SSL-compatible Curl binaries for Windows can be found at http://curl.haxx.se/latest.cgi?curl=win32-ssl-sspi . Latest version, curl 7.15.0, is in win32-ssl-sspi.zip, which contains curl.exe and documentation.

After installing Curl, you should make sure it is working by entering the command

Curl http://isc.sans.org/infocon.txt

If a color word appears on the screen (for example, green), Curl is working. In this simple example Curl retrieves Infocon content from the SANS Institute's Internet Storm Center Web site. Green means that the Internet is functioning normally and no serious threats have been detected. If instead of green the words yellow, orange or red appear on the screen, then put this article aside and visit the website http://isc.sans.org to learn about high-risk conditions on the Internet. If an error occurs, you must check that Curl is installed correctly.

Essentially, Curl fetches a Web page and then outputs the original HTML text pages to the console. However, the utility's capabilities are wider. Curl has built-in error checking. For example, the command

Curl http://noserverhere

gives an error Curl: (6) Could not resolve host: noserverhere; Host not found. Error codes can be used in scripts to test the availability of a Web page or the responsiveness of the Web server. For example, if you use Curl to retrieve a Web page every day, specifically daily Web site statistics, you can augment the script with source code that looks for error codes. If Curl issues the error code Curl: (7) couldn't connect to host, you can immediately issue a warning or send an email.

Extracting encrypted data

One of the most important advantages of Curl is its SSL compatibility. Requested HTTPS pages are sent encrypted over the network, and Curl then displays the recovered text on the screen. Curl also checks certificates - the expiration date of the certificate, whether the host name matches the host name in the certificate, and the trust level of the certificate. root certificate- and warns if the certificate is incorrect. The -cacert option allows you to specify a specific certificate file. Certificate checking is disabled using the -k option. An alternative approach is to use the -insecure option.

Not only for WWW

Curl's capabilities go beyond simply sending files over the Internet. Using Curl you can quickly list the directories of an FTP site:

Curl ftp://myftpsite

To see the site subdirectories, enter the command

Curl ftp://myftpsite/subdir/

To download a file from the Internet, simply specify the file name in the URL. The following example loads a file named readme.txt directly from the command line and displays it on the screen:

Curl ftp://ftp.microsoft.com/deskapps/games/readme.txt

It is often easier to prepare a script with Curl to input FTP files than to use the FTP command interactively.

By default, data is output directly to the console, but it can be redirected to a file using the -o and -O options. To get the page and save it to disk, you must specify the -o option. The -O option stores the resulting page in a local file, and Curl extracts the name deleted document. If the URL does not include a file name, this operation will fail. If you use Curl to send a request to a Web site without a file name, but want to store the result in a file, you can specify the file name on the command line, for example:

Authentication

Curl provides Basic, Digest and Integrated authentication methods. On most sites, form-based authentication pages can be accessed using Curl's submission functions, as will be demonstrated below. This means that you can send form data, such as your username and password, to a remote Web site that prompts you to enter information on its Web page. You can use the -u option to forward the credentials, or paste them into the URL, as is traditionally done in FTP, for example:

Curl ftp://username: password@myhtmlsite

Using Curl, techniques borrowed from FTP can be transferred to HTTP, as in the following example:

Curl http://username:password @myhtmlsite/default.htm

Curl also provides access to Web pages through a proxy server. Therefore, Curl can be configured to use a proxy server for authentication in Basic, Digest and NTLM modes.

Read the documentation

In one article it is difficult to cover all the many functions of Curl, including uploading files to the server (-T), and viewing only the information in the HTTP header (-I), and viewing all data in detailed mode (-V), and hidden output ( -s). I recommend taking a closer look at Curl's features in the tutorial posted at http://curl.haxx.se/docs .

Curl usage example

Now that we've learned the basics of Curl, let's look at a simple example of retrieving data from a Web site given some input. Let's build a simple Whois tool that demonstrates the simplicity and ease of use of Curl and the procedure for sending data to a Web site using the -d parameter. In this example, Curl sends the IP address to the Arin Whois Web site and then retrieves the results from that site. Whois looks up information about the owner of an IP address.

It's important to research the Web site before you begin, as each site's source code is different, and Curl doesn't always work the same on every site. A preliminary visit to the site allows you to collect the necessary information for Curl to work. In this example, I used a browser to visit a Web site http://www.arin.net/whois/, and noticed that the site has a single data entry field in which visitors indicate the IP address they are interested in. You need to get the details of this field, which is part of a Web form. This example uses the Perl script formfind.pl ( http://cool.haxx.se/cvs.cgi/curl/perl/contrib/ formfind?rev=HEAD&content-type=text/vnd.viewcvs-markup). The Formfind.pl script converts form data into useful output results and makes it easy to manually search for data in HTML. Of course, Perl must be deployed on your computer to run Formfind. A good Win32 Perl package can be ordered from the ActiveState ActivePerl website at http://www.activestate.com .

Let's look at the example in more detail. First, let's look at a Web site that contains a form that requests information:

Curl -o whoisOutputFile http://www.arin.net/whois/

This command retrieves the Whois page from http://www.arin.net and saves it to text file whoisOutputFile, which contains the HTML source text that is rendered by the browser when the site is visited.

Then you need to find and select the form data:

./formfind.pl

Formfind provides form variables and their possible values. In this example, the output results are quite simple (see. screen 1).

Note the Input form data named queryinput. This is the text field that Curl should send the IP address you are looking for. The specific IP address does not matter - in this example the Microsoft address was used. Using the -d parameter, the searched IP address is forwarded to the queryinput field:

Curl -d "queryinput= 207.46.133.140" http://ws.arin.net/cgibin/whois.pl

The Curl command with the -d option looks up the data in the form, in this case queryinput, that represents the IP address being searched for. In this case, the target address changes; the form should submit data to a new URL that represents the whois.pl script. The new target address can be seen in the output of formfind in Screen 1.

This example also retrieves the original HTML text of the Whois response, but it is hidden by a group of HTML tags. By default, the Curl status message shows the document size, percentage complete, and forwarding speed. The output can be cleaned up a bit and filtered by the name of the organization that owns the IP address. Curl status can be disabled using the -s option. The command should be executed via grep to get only the OrgName:

Curl -s -d "queryinput= 207.46.133.140" http://ws.arin.net/cgibin/whois.pl | grep OrgName

In this example, the output shows that OrgName is Microsoft Corp.

@echo off curl -k -s -d "queryinput= %1" http://ws.arin.net/cgibin/whois.pl | grep OrgName

Uploading Web Files from the Command Line

We often have to download various files from the Internet, for example, executable program files, script files, source archives. But this does not always need to be done through the browser. In many situations it is much easier to perform all actions through the terminal. Because this way you can automate the process. On the other hand, webmasters from time to time have to test website accessibility, check sent and received headers, and much more.

To solve such problems and problems of a similar range, you can use the curl utility. It allows you to solve a much wider range of problems, including even simulating user actions on the site. In this article we will look at how to use curl, what it is and why this program is needed.

In fact, curl is more than just a command line utility for Linux or Windows. This is a set of libraries that implement basic capabilities for working with URL pages and file transfer. The library supports working with protocols: FTP, FTPS, HTTP, HTTPS, TFTP, SCP, SFTP, Telnet, DICT, LDAP, as well as POP3, IMAP and SMTP. It is great for simulating user actions on pages and other operations with URLs.

Support for the curl library has been added to many different programming languages ​​and platforms. The curl utility is an independent wrapper for this library. It is this utility that we will focus on in this article.

curl command

Before moving on to a description of how the curl linux command can be used, let's look at the utility itself and its main options that we will need. The syntax of the utility is very simple:

$ curl options link

Now let's look at the main options:

• -# - display a simple progress bar during loading;
• -0 - use http protocol 1.0;
• -1 - use the tlsv1 encryption protocol;
• -2 - use sslv2;
• -3 - use sslv3;
• -4 - use ipv4;
• -6 - use ipv6;
• -A- specify your USER_AGENT;
• -b- save Cookie to a file;
• -c- send Cookie to the server from a file;
• -C- continue downloading the file from the break point or specified offset;
• -m- maximum waiting time for a response from the server;
• -d- send data using the POST method;
• -D- save headers returned by the server to a file;
• -e- set the Referer-uri field, indicating which site the user came from;
• -E- use an external SSL certificate;
• -f- do not display error messages;
• -F- send data in the form of a form;
• -G- if this option is enabled, then all data specified in the -d option will be transmitted using the GET method;
• -H- transfer headers to the server;
• -I- receive only the HTTP header and ignore the entire page content;
• -j- read and send cookies from a file;
• -J- remove header from request;
• -L- accept and process redirects;
• -s- maximum number of redirections using Location;
• -o- output page content to a file;
• -O- save content to a file with the name of the page or file on the server;
• -p- use a proxy;
• --proto- indicate the protocol to be used;
• -R- save time last change remote file;
• -s- display a minimum of information about errors;
• -S- display error messages;
• -T- upload the file to the server;
• -v- the most detailed output;
• -y- minimum download speed;
• -Y- maximum download speed;
• -z- download the file only if it was modified later than the specified time;
• -V- display the version.

This is by no means all of the options for curl linux, but it lists the basics that you will need to use.

How to use curl?

We've covered everything related to the theory of working with the curl utility, now it's time to move on to practice and look at examples of the curl command.

The most common task is this. Downloading the file is very simple. To do this, just pass the file name or html page to the utility in the parameters:

curl https://raw.githubusercontent.com/curl/curl/master/README.md

But here one surprise awaits you: the entire contents of the file will be sent to standard output. To write it to any file use:

curl -o readme.txt https://raw.githubusercontent.com/curl/curl/master/README.md

And if you want the resulting file to be named the same as the file on the server, use the -O option:

curl -O https://raw.githubusercontent.com/curl/curl/master/README.md

curl -# -C - -O https://cdn.kernel.org/pub/linux/kernel/v4.x/testing/linux-4.11-rc7.tar.xz

If necessary, you can download several files with one command:

curl -O https://raw.githubusercontent.com/curl/curl/master/README.md -O https://raw.githubusercontent.com/curl/curl/master/README

Another thing that may be useful for an administrator is to only download a file if it has been modified:

curl -z 21-Dec-17 https://raw.githubusercontent.com/curl/curl/master/README.md -O https://raw.githubusercontent.com/curl/curl/master/README

Speed ​​Limit

You can limit the download speed to the required limit so as not to overload the network using the -Y option:

curl --limit-rate 50K -O https://cdn.kernel.org/pub/linux/kernel/v4.x/testing/linux-4.11-rc7.tar.xz

Here you need to specify the number of kilobytes per second that can be downloaded. You can also terminate the connection if the speed is not enough, use the -Y option to do this:

curl -Y 100 -O https://raw.githubusercontent.com/curl/curl/master/README.md

Transferring files

curl -T login.txt ftp://speedtest.tele2.net/upload/

Or let’s check that the file is sent via HTTP; there is a special service for this:

curl -T ~/login.txt http://posttestserver.com/post.php

In the response, the utility will tell you where you can find the downloaded file.

Sending POST data

You can send not only files, but also any data using the POST method. Let me remind you that this method is used to send data of various forms. To send such a request, use the -d option. For testing we will use the same service:

curl -d "field1=val&fileld2=val1"http://posttestserver.com/post.php

If you are not happy with this submission option, you can pretend to submit the form. There is an option for this -F:

curl -F "password=@pass;type=text/plain" http://posttestserver.com/post.php

Here we pass the password field with the form as plain text, in the same way you can pass several parameters.

Sending and receiving cookies

Cookies are used by websites to store certain information on the user's side. This may be necessary, for example, for authentication. You can accept and send Cookies using curl. To save the received Cookies to a file, use the -c option:

curl -c cookie.txt http://posttestserver.com/post.php

You can then send the curl cookie back:

curl -b cookie.txt http://posttestserver.com/post.php

Header transmission and analysis

We don't always necessarily need the content of the page. Sometimes only the headlines can be interesting. To display only them there is the -I option:

curl -I https://site

And the -H option allows you to send several or more to the server, for example, you can pass the If-Modified-Since header so that the page is returned only if it has been modified:

curl authentication

If the server requires one of the common types of authentication, such as HTTP Basic or FTP, then curl can handle this task very easily. To specify authentication details, simply specify them separated by a colon in the -u option:

curl -u ftpuser:ftppass -T - ftp://ftp.testserver.com/myfile_1.txt

Authentication on HTTP servers will be performed in the same way.

Using a proxy

If you need to use a proxy server to download files, then that is also very simple. It is enough to specify the proxy server address in the -x option:

curl -x proxysever.test.com:3128 http://google.co.in

Conclusions

In this article, we looked at how to use curl, why this utility is needed and its main capabilities. Despite their similarity with, they are very different. The curl linux command is designed more for analyzing and simulating various actions on the server, while wget is more suitable for downloading files and crawling sites.

21 answers

You may already have a curl

You may not need to download anything:

• If you're using Windows 10 version 1803 or higher, your OS comes with a copy of curl already configured and ready to use.

If you have more esoteric needs (e.g. you need cygwin builds, 3rd party builds, libcurl, header files, sources, etc.), use the curl download wizard. After answering five questions, you will be presented with a list of download links.

Removing and adjusting curl

Find curl.exe in your downloaded package; it's probably under bin\ .

Select a location on your hard drive that will serve as a permanent home for the curls:

• If you want to make curl its own folder, C:\Program Files\curl\ or C:\curl\ will do.
• If you have a lot of free executables and don't want to add a lot separate folders in PATH , use one folder for this purpose, for example C:\Program Files\tools\ or C:\tools\ .

Place curl.exe in the folder. And never move the folder or its contents.

Then you'll want to make curl available anywhere on the command line. To do this, add the folder to PATH, like this:

1. Click the Windows 10 Start menu. Start typing "environment."
2. You will see the search result. Edit system environment variables. Choose this.
3. The System Properties window opens. Click the button Environment Variables down.
4. Select the "Path" variable in the "System Variables" section (bottom field). Click the button Change.
5. Click " Add" and paste the path to the folder where curl.exe is located.
6. Click OK, if necessary. Close any open console windows and reopen them so they get the new PATH .

Now enjoy typing curl on any command line. Time to have fun!

To run curl from the command line

a) Right click on the My Computer icon

b) Select "Properties"

d) Go to the [Advanced] tab - "Environment Variables" button

e) Under "System Variable" select "Path" and "Edit"

f) Add a semicolon and then the path to where you placed your curl.exe (eg D:\software\curl)

You can now run from the command line by typing:

Curl www.google.com

Starting with Windows 10 version 1803 (and earlier, Insider build 17063), you no longer install curl . Windows contains its own curl.exe (and tar.exe) in C:\Windows\System32\ which you can access directly from regular CMD.

C:\Users\vonc>C:\Windows\System32\curl.exe --version curl 7.55.1 (Windows) libcurl/7.55.1 WinSSL Release-Date: Protocols: dict file ftp ftps http https imap imaps pop3 pop3s smtp smtps telnet tftp Features: AsynchDNS IPv6 Largefile SSPI Kerberos SPNEGO NTLM SSL C:\Users\vonc>C:\Windows\System32\tar.exe --version bsdtar 3.3.2 - libarchive 3.3.2 zlib/1.2.5.f- ipp

It's probably worth noting that Powershell v3 and later contains the Invoke-WebRequest cmdlet, which has some curling capabilities. It's probably worth mentioning the New-WebServiceProxy and Invoke-RestMethod cmdlets as well.

I'm not sure if they will suit you or not, but even though I'm not Windows, I have to say that I find the object approach that PS uses much easier to work with utilities like curl, wget, etc. They might be worth a look

You can create latest version curl, openssl, libssh2 and zlib in 3 easy steps by following this tutorial.

Curl is built statically, so you don't have to propagate the necessary dynamic runtime.

You can also download the pre-built version (x86 and x64) from

I thought I would write exactly what I did (Windows 10, 64-bit version):

Select executable file curl.

Select Win64.

Choose universal.

Choose any one.

curl version: 7.53.1 - SSL enabled SSH enabled. Credit: Victor Shakats. This package is an executable type of curl. This link will get you a pre-compiled curl binary (or in some cases, using the information provided on the page that link takes you to). You may or may not install libcurl as a shared library/DLL. The file is packaged using 7zip. 7zip is a file archiving format.

Click download.

You should have curl-7.53.1-win64-mingw.7z file in your downloads folder.

Install 7-Zip if you don't have it.

Right click, 7-Zip, Extract here. Copy and paste the extracted file somewhere like Z:\Tools\

If you look in the bin folder you will see curl.exe. If you double click on it, the window will quickly flash and disappear. To run it, you need to use the command line. Go to your bin folder and enter curl followed by your options to make the request. You must use double quotes. Single quotes will not work with curl on Windows.

Now you need to add curl to the user Path variable so that you don't have to navigate to the correct folder to run the program. Go to "This PC", "Computer", "System Properties", " Additional options systems", login as administrator (you are not an administrator, right? Right?). Environment variables, system variables, look at the list and select "Path", then "Edit", then New, then e.g.

Z:\Tools\curl-7.53.1-win64-MinGW\Bin

You can add a backslash if you want, I don't think it matters. Press the move up button until it is at the top of the list and you can easily see it from the previous screen. Click OK, OK, OK, then open the command prompt and you can run curl by typing curl from any folder as any user. Don't forget your double quotes.

This is the answer I would like to receive.

I was looking for the download process Curl and every where they said copy the file curl.exe on System32, but they didn't provide a direct link. so you can enjoy here curl.exe easy to bin folder Just

unzip it and then go to the bin folder where you will get the exe file

This installer made it easy for me http://www.confusedbycode.com/curl/

"You can install cURL for Windows in just a few clicks. Simply download and run the installer from the table below and click "Install". The default installation includes.

The life of a web developer is overshadowed by difficulties. It is especially unpleasant when the source of these difficulties is unknown. Is this a problem with sending the request, or with the response, or with a third-party library, or is the external API buggy? There are a bunch of different gadgets that can make our lives easier. Here are some command line tools that I personally find invaluable.

cURL
cURL is a program for transferring data over various protocols, similar to wget. The main difference is that by default wget saves to a file, while cURL outputs to the command line. This makes it very easy to view the website content. For example, here's how to quickly get your current external IP:

$ curl ifconfig.me 93.96.141.93
Options -i(show titles) and -I(show headers only) make cURL an excellent tool for debugging HTTP responses and analyzing what exactly the server is sending you:

$ curl -I habrahabr.ru HTTP/1.1 200 OK Server: nginx Date: Thu, 18 Aug 2011 14:15:36 GMT Content-Type: text/html; charset=utf-8 Connection: keep-alive Keep-alive: timeout=25
Parameter -L Also useful, it forces cURL to automatically follow redirects. cURL supports HTTP authentication, cookies, HTTP proxy tunneling, manual settings in the headlines and much, much more.

Siege
Siege is a load testing tool. Plus, it has a convenient option -g, which is very similar to curl –iL, but in addition it also shows you the http request headers. Here's an example from google.com (some headings removed for brevity):

$ siege -g www.google.com GET / HTTP/1.1 Host: www.google.com User-Agent: JoeDog/1.00 (X11; I; Siege 2.70) Connection: close HTTP/1.1 302 Found Location: http:// www.google.co.uk/ Content-Type: text/html; charset=UTF-8 Server: gws Content-Length: 221 Connection: close GET / HTTP/1.1 Host: www.google.co.uk User-Agent: JoeDog/1.00 (X11; I; Siege 2.70) Connection: close HTTP/ 1.1 200 OK Content-Type: text/html; charset=ISO-8859-1 X-XSS-Protection: 1; mode=block Connection: close
But what Siege is really great for is load testing. Like the Apache benchmark ab, it can send many parallel requests to the site and see how it handles the traffic. The following example shows how we test Google with 20 queries for 30 seconds and then print the result:

$ siege -c20 www.google.co.uk -b -t30s ... Lifting the server siege... done. Transactions: 1400 hits Availability: 100.00 % Elapsed time: 29.22 secs Data transferred: 13.32 MB Response time: 0.41 secs Transaction rate: 47.91 trans/sec Throughput: 0.46 MB/sec Concurrency: 19.53 Successful transactions: 1400 Failed transactions: 0 Longest transaction: 4.08 Shortest transaction: 0.08
One of the most useful functions Siege is that it can work not only with one address, but also with a list of URLs from a file. This is great for load testing because you can simulate real site traffic rather than just hitting the same URL over and over again. For example, here's how to use Siege to load a server using addresses from your Apache log:

$ cut -d " " -f7 /var/log/apache2/access.log > urls.txt $ siege -c -b -f urls.txt
Ngrep
For serious traffic analysis, there is Wireshark with thousands of settings, filters and configurations. There is also a command line version tshark. But for simple tasks, I consider Wireshark’s functionality redundant. So unless I need a powerful weapon, I use the . It allows you to do the same thing with network packets as grep does with files.

For web traffic, you will almost always want to use the parameter -W to preserve string formatting as well as the option -q, which hides redundant information about unmatched packets. Here is an example command that intercepts all packets with a GET or POST command:

Ngrep -q -W byline "^(GET|POST) .*"
You can add an additional filter for packets, for example, by a given host, IP address or port. Here is a filter for all traffic to and from google.com, port 80, which contains the word “search”.

Ngrep -q -W byline "search" host www.google.com and port 80

c URL is a very useful command line tool for transferring data from or to a server. Curl supports various protocols such as FILE, HTTP, HTTPS, IMAP, IMAPS, LDAP, DICT, LDAPS, TELNET, FTPS, GOPHER, RTMP, RTSP, SCP, SFTP, POP3, POP3S, SMB, SMBS, SMTP, SMTPS, and TFTP.

cURL can be used in a variety of different and interesting ways. With this tool you can download, upload and manage files, check your address email, or even update your status on some social media websites or check the weather outside. In this article, we will look at the five most useful and basic uses of the cURL tool on any .

1. Check the URL

One of the most common and simplest uses of cURL is printing the command itself followed by the URL you want to test

Curl https://domain.ru

This command will display the contents of the URL on your terminal

2. Save the URL output to a file

Curl -o website https://domain.ru % Total % Received % Xferd Average Speed ​​Time Time Time Current Dload Upload Total Spent Left Speed ​​100 41793 0 41793 0 0 275k 0 --:--:-- --:-- :-- --:--:-- 2.9M

In this example, the output will be saved to a file named 'website' in the current working directory.

3. Uploading Files Using Curl

You can download files using Curl by adding the -o option to the command. It is used to save files to local server with the same names as on the remote server

Curl -O https://domain.ru/file.zip

In this example, the archive 'file.zip' will be downloaded to the current working directory.

You can also upload a file with a different name by adding the -o option to cURL.

Curl -o archive.zip https://domain.ru/file.zip

So the archive 'file.zip' will be downloaded and saved as 'Archive.zip'.

cURL can also be used to download multiple files at once, as shown in the example below

Curl -O https://domain.ru/file.zip -O https://domain.com/file2.zip

Curl can also be used to upload files securely over SSH using the following command

Curl -u user sftp://server.domain.ru/path/to/file

Please note that you must use full path to the file you want to download

4. Take information from the website's HTTP header

You can easily get HTTP header information from any website by adding the -I ('i') option to cURL.

Curl -I http://domain.ru HTTP/1.1 200 OK Date: Sun, 16 Oct 2016 23:37:15 GMT Server: Apache/2.4.23 (Unix) X-Powered-By: PHP/5.6.24 Connection : close Content-Type: text/html; charset=UTF-8

5. Access to FTP server

To access the FTP server using Curl, you need to use the following command

Curl ftp://ftp.domain.ru --user username:password

Curl will connect to the FTP server and list all files and directories in the user's home directory

You can download the file using FTP

Curl ftp://ftp.domain.ru/file.zip --user username:password

and upload the file to the FTP server

Curl -T file.zip ftp://ftp.domain.ru/ --user username:password

You can check the Curl page manually to see everything available options cURL and its functionality

Man curl

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