kawipiko/documentation/manuals/server.1.man

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.TH "KAWIPIKO-SERVER" "1" "2022-08-28" "volution.ro" "kawipiko"
.SH NAME
kawipiko -- blazingly fast static HTTP server \- kawipiko-server
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.nf
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>> kawipiko\-server \-\-help
>> kawipiko\-server \-\-man
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.fi
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\-\-archive <path>
\-\-archive\-inmem           (memory\-loaded archive file)
\-\-archive\-mmap            (memory\-mapped archive file)
\-\-archive\-preload         (preload archive in OS cache)

\-\-bind <ip>:<port>        (HTTP, only HTTP/1.1, FastHTTP)
\-\-bind\-2 <ip>:<port>      (HTTP, only HTTP/1.1, Go net/http)
\-\-bind\-tls <ip>:<port>    (HTTPS, only HTTP/1.1, FastHTTP)
\-\-bind\-tls\-2 <ip>:<port>  (HTTPS, with HTTP/2, Go net/http)
\-\-bind\-quic <ip>:<port>   (HTTPS, with HTTP/3)

\-\-http1\-disable
\-\-http2\-disable
\-\-http3\-alt\-svc <ip>:<port>

\-\-tls\-bundle <path>       (TLS certificate bundle)
\-\-tls\-public <path>       (TLS certificate public)
\-\-tls\-private <path>      (TLS certificate private)
\-\-tls\-self\-rsa            (use self\-signed RSA)
\-\-tls\-self\-ed25519        (use self\-signed Ed25519)

\-\-processes <count>       (of slave processes)
\-\-threads <count>         (of threads per process)
\-\-index\-all
\-\-index\-paths
\-\-index\-data\-meta
\-\-index\-data\-content

\-\-hosts\-disable           (ignore \(gaHost\(ga header)

\-\-security\-headers\-tls
\-\-security\-headers\-disable

\-\-limit\-memory <MiB>
\-\-timeout\-disable

\-\-report  \-\-quiet  \-\-debug

\-\-help       (show this short help)
\-\-man        (show the full manual)

\-\-dummy
\-\-dummy\-empty
\-\-dummy\-delay <duration>

\-\-profile\-cpu <path>
\-\-profile\-mem <path>
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.fi
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.ce
----

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.SH FLAGS
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\fB\-\-bind <ip:port>\fP, \fB\-\-bind\-tls <ip:port>\fP, \fB\-\-bind\-2 <ip:port>\fP, \fB\-\-bind\-tls\-2 <ip:port>\fP, and \fB\-\-bind\-quic <ip:port>\fP
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The IP and port to listen for requests with:
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.IP \(bu 2
(insecure) HTTP/1.1 for \fB\-\-bind\fP, leveraging \fBfasthttp\fP library;
.IP \(bu 2
(secure) HTTP/1.1 over TLS for \fB\-\-bind\-tls\fP, leveraging \fBfasthttp\fP library;
.IP \(bu 2
(insecure) HTTP/1.1 for \fI\-\-bind\-2\(ga\fP, leveraging Go\(aqs \fBnet/http\fP library; (not as performant as the \fBfasthttp\fP powered endpoint;)
.IP \(bu 2
(secure) H2 or HTTP/1.1 over TLS for \fB\-\-bind\-tls\-2\fP, leveraging Go\(aqs \fBnet/http\fP;  (not as performant as the \fBfasthttp\fP powered endpoint;)
.IP \(bu 2
(secure) H3 over QUIC for \fB\-\-bind\-quic\fP, leveraging \fBgithub.com/lucas\-clemente/quic\-go\fP library;  (given that H3 is still a new protocol, this must be used with caution;  also one should use the \fB\-\-http3\-alt\-svc <ip:port>\fP;)
.IP \(bu 2
if one uses just \fB\-\-bind\-tls\fP (without \fB\-\-bind\-tls\-2\fP, and without \fB\-\-http2\-disabled\fP), then the TLS endpoint is split between \fBfasthttp\fP for HTTP/1.1 and Go\(aqs \fBnet/http\fP for H2;
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\fB\-\-tls\-bundle <path>\fP, \fB\-\-tls\-public <path>\fP, and \fB\-\-tls\-private <path>\fP (optional)
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If TLS is enabled, these options allows one to specify the certificate to use, either as a single file (a bundle) or separate files (the actual public certificate and the private key).
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If one doesn\(aqt specify any of these options, an embedded self\-signed certificate will be used.  In such case, one can choose between RSA (the \fB\-\-tls\-self\-rsa\fP flag) or Ed25519 (the \fB\-\-tls\-self\-ed25519\fP flag);
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\fB\-\-http1\-disable\fP, \fB\-\-http2\-disable\fP
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Disables that particular protocol.
(It can be used only with \fB\-\-bind\-tls\-2\fP, given that \fBfasthttp\fP only supports HTTP/1.)
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\fB\-\-processes <count>\fP and \fB\-\-threads <count>\fP
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The number of processes and threads per each process to start.  (Given Go\(aqs concurrency model, the threads count is somewhat a soft limit, hinting to the runtime the desired parallelism level.)
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It is highly recommended to use one process and as many threads as there are cores.
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Depending on the use\-case, one can use multiple processes each with a single thread;  this would reduce goroutine contention if it causes problems.
(However note that if using \fB\-\-archive\-inmem\fP, then each process will allocate its own copy of the database in RAM;  in such cases it is highly recommended to use \fB\-\-archive\-mmap\fP\&.)
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\fB\-\-archive <path>\fP
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The path of the CDB file that contains the archived static content.
(It can be created with the \fBkawipiko\-archiver\fP tool.)
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\fB\-\-archive\-inmem\fP
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Reads the CDB file in RAM, and thus all requests are served from RAM without touching the file\-system.
(The memory impact is equal to the size of the CDB archive.  This can be used if enough RAM is available to avoid swapping.)
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\fB\-\-archive\-mmap\fP
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(\fBrecommended\fP) The CDB file is \fI\%memory mapped\fP, thus reading its data uses the kernel\(aqs file\-system cache, as opposed to issuing \fBread\fP syscalls.
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\fB\-\-archive\-preload\fP
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Before starting to serve requests, read the CDB file so that its data is buffered in the kernel\(aqs file\-system cache.  (This option can be used with or without \fB\-\-archive\-mmap\fP\&.)
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\fB\-\-index\-all\fP, \fB\-\-index\-paths\fP, \fB\-\-index\-data\-meta\fP,  and \fB\-\-index\-data\-content\fP
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In order to serve a request \fBkawipiko\fP does the following:
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.IP \(bu 2
given the request\(aqs path, it is used to locate the corresponding resource\(aqs metadata (i.e. response headers) and data (i.e. response body) references;
by using \fB\-\-index\-paths\fP a RAM\-based lookup table is created to eliminate a CDB read operation for this purpose;  (the memory impact is proportional to the size of all resource paths combined;  given that the number of resources is acceptable, say up to a couple hundred thousand, one could safely use this option;)
.IP \(bu 2
based on the resource\(aqs metadata reference, the actual metadata (i.e. the response headers) is located;
by using \fB\-\-index\-data\-meta\fP a RAM\-based lookup table is created to eliminate a CDB read operation for this purpose;  (the memory impact is proportional to the size of all resource metadata blocks combined;  given that the metadata blocks are deduplicated, one could safely use this option;  if one also uses \fB\-\-archive\-mmap\fP or \fB\-\-archive\-inmem\fP, then the memory impact is only proportional to the number of resource metadata blocks;)
.IP \(bu 2
based on the resource\(aqs data reference, the actual data (i.e. the response body) is located;
by using \fB\-\-index\-data\-content\fP a RAM\-based lookup table is created to eliminate a CDB operation operation for this purpose;  (the memory impact is proportional to the size of all resource data blocks combined;  one can use this option to obtain the best performance;  if one also uses \fB\-\-archive\-mmap\fP or \fB\-\-archive\-inmem\fP, then the memory impact is only proportional to the number of resource data blocks;)
.IP \(bu 2
\fB\-\-index\-all\fP enables all the options above;
.IP \(bu 2
(depending on the use\-case) it is recommended to use \fB\-\-index\-paths\fP;  if \fB\-\-exclude\-etag\fP was used during archival, one can also use \fB\-\-index\-data\-meta\fP;
.IP \(bu 2
it is recommended to use either \fB\-\-archive\-mmap\fP or  \fB\-\-archive\-inmem\fP, else (especially if data is indexed) the resulting effect is that of loading everything in RAM;
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\fB\-\-hosts\-disable\fP
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Disables the virtual\-hosts feature by ignoring the \fIHost\fP header.
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\fB\-\-security\-headers\-tls\fP
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Enables adding the following TLS related headers to the response:
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Strict\-Transport\-Security: max\-age=31536000
Content\-Security\-Policy: upgrade\-insecure\-requests
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These instruct the browser to always use HTTPS for the served domain.
(Useful even without HTTPS, when used behind a TLS terminator, load\-balancer or proxy that do support HTTPS.)
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\fB\-\-security\-headers\-disable\fP
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Disables adding a few security related headers:
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Referrer\-Policy: strict\-origin\-when\-cross\-origin
X\-Content\-Type\-Options: nosniff
X\-XSS\-Protection: 1; mode=block
X\-Frame\-Options: sameorigin
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\fB\-\-report\fP
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Enables periodic reporting of various metrics.
Also enables reporting a selection of metrics if certain thresholds are matched (which most likely is a sign of high\-load).
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\fB\-\-quiet\fP
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Disables most logging messages.
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\fB\-\-debug\fP
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Enables all logging messages.
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\fB\-\-dummy\fP, \fB\-\-dummy\-empty\fP
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It starts the server in a "dummy" mode, ignoring all archive related arguments and always responding with \fBhello world!\en\fP (unless \fB\-\-dummy\-empty\fP was used) and without additional headers except the HTTP status line and \fBContent\-Length\fP\&.
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This argument can be used to benchmark the raw performance of the underlying \fBfasthttp\fP, Go\(aqs \fBnet/http\fP, or QUIC performance;  this is the upper limit of the achievable performance given the underlying technologies.
(From my own benchmarks \fBkawipiko\fP\(aqs adds only about ~15% overhead when actually serving the \fBhello\-world.cdb\fP archive.)
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\fB\-\-dummy\-delay <duration>\fP
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Enables delaying each response with a certain amount (for example \fB1s\fP, \fB1ms\fP, etc.)
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It can be used to simulate the real\-world network latencies, perhaps to see how a site with many resources loads in various conditions.
(For example, see \fI\%an experiment\fP I made with an image made out of 1425 tiles.)
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\fB\-\-profile\-cpu <path>\fP, and \fB\-\-profile\-mem <path>\fP
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Enables CPU and memory profiling using Go\(aqs profiling infrastructure.
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