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Diffstat (limited to 'docs/FAQ')
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1 files changed, 53 insertions, 50 deletions
@@ -215,22 +215,22 @@ FAQ another tool that uses libcurl. We do not add things to curl that other small and available tools already do - very fine at the side. Curl's output is fine to pipe into another program or - redirect to another file for the next program to interpret. + very well at the side. Curl's output can be piped into another program or + redirected to another file for the next program to interpret. We focus on protocol related issues and improvements. If you wanna do more - magic with the supported protocols than curl currently does, chances are big + magic with the supported protocols than curl currently does, chances are good we will agree. If you wanna add more protocols, we may very well agree. - If you want someone else to make all the work while you wait for us to + If you want someone else to do all the work while you wait for us to implement it for you, that is not a very friendly attitude. We spend a considerable time already on maintaining and developing curl. In order to get more out of us, you should consider trading in some of your time and - efforts in return. Simply go to the GitHub repo which resides at + effort in return. Simply go to the GitHub repo which resides at https://github.com/curl/curl, fork the project, and create pull requests with your proposed changes. - If you write the code, chances are bigger that it will get into curl faster. + If you write the code, chances are better that it will get into curl faster. 1.5 Who makes curl? @@ -238,7 +238,7 @@ FAQ project leader and main developer, but other persons' submissions are important and crucial. Anyone can contribute and post their changes and improvements and have them inserted in the main sources (of course on the - condition that developers agree on that the fixes are good). + condition that developers agree that the fixes are good). The full list of all contributors is found in the docs/THANKS file. @@ -247,9 +247,9 @@ FAQ 1.6 What do you get for making curl? Project cURL is entirely free and open. No person gets paid for developing - curl on full time. We do this voluntarily, mostly on spare time. + curl full time. We do this voluntarily, mostly in our spare time. Occasionally companies pay individual developers to work on curl, but that's - up to each company and developer. It is not controlled by nor supervised in + up to each company and developer. This is not controlled by nor supervised in any way by the project. We still get help from companies. Haxx provides web site, bandwidth, mailing @@ -260,11 +260,11 @@ FAQ do so in the future. If you want to support our project, consider a donation or a banner-program - or even better: by helping us coding, documenting, testing etc. + or even better: by helping us with coding, documenting or testing etc. 1.7 What about CURL from curl.com? - During the summer 2001, curl.com was busy advertising their client-side + During the summer of 2001, curl.com was busy advertising their client-side programming language for the web, named CURL. We are in no way associated with curl.com or their CURL programming @@ -277,7 +277,7 @@ FAQ We recognize that we will be living in parallel with curl.com and wish them every success. - 1.8 I have a problem who do I mail? + 1.8 I have a problem whom do I mail? Please do not mail any single individual unless you really need to. Keep curl-related questions on a suitable mailing list. All available mailing @@ -285,8 +285,8 @@ FAQ https://curl.haxx.se/mail/ Keeping curl-related questions and discussions on mailing lists allows - others to join in and help, to share their ideas, contribute their - suggestions and spread their wisdom. Keeping discussions on public mailing + others to join in and help, to share their ideas, to contribute their + suggestions and to spread their wisdom. Keeping discussions on public mailing lists also allows for others to learn from this (both current and future users thanks to the web based archives of the mailing lists), thus saving us from having to repeat ourselves even more. Thanks for respecting this. @@ -324,9 +324,9 @@ FAQ 1.11 Why don't you update ca-bundle.crt - The ca cert bundle that used to shipped with curl was very outdated and must - be replaced with an up-to-date version by anyone who wants to verify - peers. It is no longer provided by curl. The last curl release ever that + The ca cert bundle that used to be shipped with curl was very outdated and + must be replaced with an up-to-date version by anyone who wants to verify + peers. It is no longer provided by curl. The last curl release that ever shipped a ca cert bundle was curl 7.18.0. In the cURL project we've decided not to attempt to keep this file updated @@ -347,7 +347,7 @@ FAQ 1.12 I have a problem who can I chat with? There's a bunch of friendly people hanging out in the #curl channel on the - IRC network irc.freenode.net. If you're polite and nice, chances are big + IRC network irc.freenode.net. If you're polite and nice, chances are good that you can get -- or provide -- help instantly. 1.13 curl's ECCN number? @@ -430,7 +430,7 @@ FAQ 2.1.2 only the libssl lib is missing If all include files and the libcrypto lib is present, with only the - libssl being missing according to configure, this is mostly likely because + libssl being missing according to configure, this is most likely because a few functions are left out from the libssl. If the function names missing include RSA or RSAREF you can be certain @@ -467,7 +467,7 @@ FAQ 2.5 Install libcurl for both 32bit and 64bit? - In curl's configure procedure one of the regular include files get created + In curl's configure procedure one of the regular include files gets created with platform specific information. The file 'curl/curlbuild.h' in the installed libcurl file tree is therefore somewhat tied to that particular platform. @@ -520,11 +520,14 @@ FAQ 3.3 Why doesn't my posting using -F work? - You can't simply use -F or -d at your choice. The web server that will - receive your post expects one of the formats. If the form you're trying to - submit uses the type 'multipart/form-data', then and only then you must use - the -F type. In all the most common cases, you should use -d which then - causes a posting with the type 'application/x-www-form-urlencoded'. + You can't arbitrarily use -F or -d, the choice between -F or -d depends on the + HTTP operation you need curl to do and what the web server that will receive + your post expects. + + If the form you're trying to submit uses the type 'multipart/form-data', then + and only then you must use the -F type. In all the most common cases, you + should use -d which then causes a posting with the type + 'application/x-www-form-urlencoded'. This is described in some detail in the MANUAL and TheArtOfHttpScripting documents, and if you don't understand it the first time, read it again @@ -611,7 +614,7 @@ FAQ XML-RPC are all such ones. You can use -X to set custom requests and -H to set custom headers (or replace internally generated ones). - Using libcurl is of course just as fine and you'd just use the proper + Using libcurl is of course just as good and you'd just use the proper library options to do the same. 3.11 How do I POST with a different Content-Type? @@ -631,7 +634,7 @@ FAQ There is one exception to this rule, and that is if you can "tunnel through" the given HTTP proxy. Proxy tunneling is enabled with a special option (-p) and is generally not available as proxy admins usually disable tunneling to - other ports than 443 (which is used for HTTPS access through proxies). + ports other than 443 (which is used for HTTPS access through proxies). 3.13 Why does my single/double quotes fail? @@ -650,7 +653,7 @@ FAQ Windows/DOS prompts I believe you're forced to use double (") quotes. Please study the documentation for your particular environment. Examples in - the curl docs will use a mix of both these ones as shown above. You must + the curl docs will use a mix of both of these as shown above. You must adjust them to work in your environment. Remember that curl works and runs on more operating systems than most single @@ -685,7 +688,7 @@ FAQ No. curl itself has no code that performs recursive operations, such as those performed by wget and similar tools. - There exist wrapper scripts with that functionality (for example the + There exists wrapper scripts with that functionality (for example the curlmirror perl script), and you can write programs based on libcurl to do it, but the command line tool curl itself cannot. @@ -696,9 +699,9 @@ FAQ CLIENT CERTIFICATE - The server you communicate may require that you can provide this in order to - prove that you actually are who you claim to be. If the server doesn't - require this, you don't need a client certificate. + The server you communicate with may require that you can provide this in + order to prove that you actually are who you claim to be. If the server + doesn't require this, you don't need a client certificate. A client certificate is always used together with a private key, and the private key has a pass phrase that protects it. @@ -859,14 +862,14 @@ FAQ 4.3 How can I use {, }, [ or ] to specify multiple URLs? - Because those letters have a special meaning to the shell, and to be used in + Because those letters have a special meaning to the shell, to be used in a URL specified to curl you must quote them. - An example that downloads two URLs (sequentially) would do: + An example that downloads two URLs (sequentially) would be: curl '{curl,www}.haxx.se' - To be able to use those letters as actual parts of the URL (without using + To be able to use those characters as actual parts of the URL (without using them for the curl URL "globbing" system), use the -g/--globoff option: curl -g 'www.site.com/weirdname[].html' @@ -1025,7 +1028,7 @@ FAQ 4.14 Redirects work in browser but not with curl! - curl supports HTTP redirects fine (see item 3.8). Browsers generally support + curl supports HTTP redirects well (see item 3.8). Browsers generally support at least two other ways to perform redirects that curl does not: Meta tags. You can write a HTML tag that will cause the browser to redirect @@ -1049,7 +1052,7 @@ FAQ To use explicit FTPS, you use a FTP:// URL and the --ftp-ssl option (or one of its related flavours). This is the most common method, and the one - mandated by RFC4217. This kind of connection then of course uses the + mandated by RFC4217. This kind of connection will then of course use the standard FTP port 21 by default. 4.16 My HTTP POST or PUT requests are slow! @@ -1057,7 +1060,7 @@ FAQ libcurl makes all POST and PUT requests (except for POST requests with a very tiny request body) use the "Expect: 100-continue" header. This header allows the server to deny the operation early so that libcurl can bail out - already before having to send any data. This is useful in authentication + before having to send any data. This is useful in authentication cases and others. However, many servers don't implement the Expect: stuff properly and if the @@ -1148,7 +1151,7 @@ FAQ When doing HTTP transfers, curl will perform exactly what you're asking it to do and if successful it will not return an error. You can use curl to test your web server's "file not found" page (that gets 404 back), you can - use it to check your authentication protected web pages (that get a 401 + use it to check your authentication protected web pages (that gets a 401 back) and so on. The specific HTTP response code does not constitute a problem or error for @@ -1163,7 +1166,7 @@ FAQ libcurl speak). You can also use the -w option and the variable %{response_code} to extract - the exact response code that was return in the response. + the exact response code that was returned in the response. 4.21 Why is there a HTTP/1.1 in my HTTP/2 request? @@ -1173,8 +1176,8 @@ FAQ The reason for this is that we first generate the request to send using the old 1.1 style and show that request in the verbose output, and then we convert it over to the binary header-compressed HTTP/2 style. The actual - "1.1" part from that request is then not actually used in the transfer. The - binary HTTP/2 headers are not human readable. + "1.1" part from that request is then not actually used in the transfer. + The binary HTTP/2 headers are not human readable. 5. libcurl Issues @@ -1256,10 +1259,10 @@ FAQ libcurl will reuse connections for all transfers that are made using the same libcurl handle. - When you use the easy interface, the connection cache is kept within the - easy handle. If you instead use the multi interface, the connection cache - will be kept within the multi handle and will be shared among all the easy - handles that are used within the same multi handle. + When you use the easy interface the connection cache is kept within the easy + handle. If you instead use the multi interface, the connection cache will be + kept within the multi handle and will be shared among all the easy handles + that are used within the same multi handle. 5.7 Link errors when building libcurl on Windows! @@ -1318,8 +1321,8 @@ FAQ you want to change name resolver function you must rebuild libcurl and tell it to use a different function. - - The non-IPv6 resolver that can use one out of four host name resolve calls - (depending on what your system supports): + - The non-IPv6 resolver that can use one of four different host name resolve + calls (depending on what your system supports): A - gethostbyname() B - gethostbyname_r() with 3 arguments @@ -1353,7 +1356,7 @@ FAQ 5.12 Can I make libcurl fake or hide my real IP address? No. libcurl operates on a higher level. Besides, faking IP address would - imply sending IP packet with a made-up source address, and then you normally + imply sending IP packets with a made-up source address, and then you normally get a problem with receiving the packet sent back as they would then not be routed to you! @@ -1383,7 +1386,7 @@ FAQ libcurl is a C library, it doesn't know anything about C++ member functions. - You can overcome this "limitation" with a relative ease using a static + You can overcome this "limitation" with relative ease using a static member function that is passed a pointer to the class: // f is the pointer to your object. |