oha是一款小巧而强大的测试工具，使用Rust语言编写，依托tokio和ratatui库，实现了高效且美观的测试界面。它可用于向Web应用发送负载，并实时显示带有TUI（Text User Interface）动画的测试结果。这款工具受到了rakyll/hey的启发，并在其基础上进行了改进和创新。
1、实时TUI显示：
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oha在测试过程中会实时显示测试结果，包括请求数、并发数、响应时间等关键指标。
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TUI界面美观且直观，使得测试结果的查看和分析变得更加方便。
2、灵活的配置选项：
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oha提供了丰富的配置选项，允许用户根据测试需求进行定制。
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用户可以指定请求数、并发数、HTTP版本、请求方法、自定义HTTP头等参数。
3、支持HTTP/1和HTTP/2：
4、动态URL生成：
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oha支持使用正则表达式动态生成URL，使得测试场景更加多样化，例如：
oha --rand-regex-url http://127.0.0.1/[a-z][a-z][0-9] -
用户可以通过配置选项来限制生成URL的最大重复次数，以避免无效的测试请求。
5、性能优化与结果分析：
6、跨平台支持：
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oha支持Linux、Windows和macOS等多个操作系统，方便用户在不同平台上进行测试。
三、安装与使用
oha的安装过程非常简单，用户可以通过cargo、Homebrew、winget等多种方式进行安装。安装完成后，用户可以通过命令行使用oha进行测试。
# Linux/macOS，使用Cargo安装（需要先安装Rust工具链）
cargo install oha# 使用Homebrew安装（适用于macOS）
brew install oha# Windows，使用winget安装
winget install hatoo.oha安装完成后，你可以运行基本测试，比如发送100个请求到目标URL：
oha -n 100 https://127.0.0.1:5000
如果你想设置并发连接数为50，可以这样做：
oha -c 50 https://127.0.0.1:5000
或者，如果你想运行持续时间为30秒的测试：
oha -z 30s https://127.0.0.1:5000
当然，这样参数也可以组合使用，例如，要发送100个请求，并发数为50，持续时间30s,可以使用以下命令：
oha -n 200 -c 50 -z 30s https://127.0.0.1:5000
执行完成后，oha能够实时显示请求的发送数量、响应时间、错误率等关键指标，让你对系统的性能表现一目了然。
用户还可以根据需要配置其他选项，如指定HTTP方法、自定义HTTP头、设置请求超时等。
更多参数用法，可参考：
Usage: oha [OPTIONS] <URL>Arguments:<URL> Target URL.Options:-n <N_REQUESTS>Number of requests to run. [default: 200]-c <N_CONNECTIONS>Number of connections to run concurrently. You may should increase limit to number of open files for larger `-c`. [default: 50]-p <N_HTTP2_PARALLEL>Number of parallel requests to send on HTTP/2. `oha` will run c * p concurrent workers in total. [default: 1]-z <DURATION>Duration of application to send requests. If duration is specified, n is ignored.On HTTP/1, When the duration is reached, ongoing requests are aborted and counted as "aborted due to deadline"You can change this behavior with `-w` option.Currently, on HTTP/2, When the duration is reached, ongoing requests are waited. `-w` option is ignored.Examples: -z 10s -z 3m.-w, --wait-ongoing-requests-after-deadlineWhen the duration is reached, ongoing requests are waited-q <QUERY_PER_SECOND>Rate limit for all, in queries per second (QPS)--burst-delay <BURST_DURATION>Introduce delay between a predefined number of requests.Note: If qps is specified, burst will be ignored--burst-rate <BURST_REQUESTS>Rates of requests for burst. Default is 1Note: If qps is specified, burst will be ignored--rand-regex-urlGenerate URL by rand_regex crate but dot is disabled for each query e.g. http://127.0.0.1/[a-z][a-z][0-9]. Currently dynamic scheme, host and port with keep-alive do not work well. See https://docs.rs/rand_regex/latest/rand_regex/struct.Regex.html for details of syntax.--max-repeat <MAX_REPEAT>A parameter for the '--rand-regex-url'. The max_repeat parameter gives the maximum extra repeat counts the x*, x+ and x{n,} operators will become. [default: 4]--dump-urls <DUMP_URLS>Dump target Urls <DUMP_URLS> times to debug --rand-regex-url--latency-correctionCorrect latency to avoid coordinated omission problem. It's ignored if -q is not set.--no-tuiNo realtime tui-j, --jsonPrint results as JSON--fps <FPS>Frame per second for tui. [default: 16]-m, --method <METHOD>HTTP method [default: GET]-H <HEADERS>Custom HTTP header. Examples: -H "foo: bar"-t <TIMEOUT>Timeout for each request. Default to infinite.-A <ACCEPT_HEADER>HTTP Accept Header.-d <BODY_STRING>HTTP request body.-D <BODY_PATH>HTTP request body from file.-T <CONTENT_TYPE>Content-Type.-a <BASIC_AUTH>Basic authentication, username:password-x <PROXY>HTTP proxy--proxy-http-version <PROXY_HTTP_VERSION>HTTP version to connect to proxy. Available values 0.9, 1.0, 1.1, 2.--proxy-http2Use HTTP/2 to connect to proxy. Shorthand for --proxy-http-version=2--http-version <HTTP_VERSION>HTTP version. Available values 0.9, 1.0, 1.1, 2.--http2Use HTTP/2. Shorthand for --http-version=2--host <HOST>HTTP Host header--disable-compressionDisable compression.-r, --redirect <REDIRECT>Limit for number of Redirect. Set 0 for no redirection. Redirection isn't supported for HTTP/2. [default: 10]--disable-keepaliveDisable keep-alive, prevents re-use of TCP connections between different HTTP requests. This isn't supported for HTTP/2.--no-pre-lookup*Not* perform a DNS lookup at beginning to cache it--ipv6Lookup only ipv6.--ipv4Lookup only ipv4.--insecureAccept invalid certs.--connect-to <CONNECT_TO>Override DNS resolution and default port numbers with strings like 'example.org:443:localhost:8443'--disable-colorDisable the color scheme.--unix-socket <UNIX_SOCKET>Connect to a unix socket instead of the domain in the URL. Only for non-HTTPS URLs.--stats-success-breakdownInclude a response status code successful or not successful breakdown for the time histogram and distribution statistics--db-url <DB_URL>Write succeeded requests to sqlite database url E.G test.db--debugPerform a single request and dump the request and response-h, --helpPrint help-V, --versionPrint version oha 作为一款 Rust 开源 HTTP 性能测试工具，以其强大的功能、易用的特性、高效可靠的性能，为http性能压测又提供了一个好的选择，让我们能够针对不同的项目特性选择合适的工具。
如果你在为Jmeter、 LR等工具的一些缺点而烦恼，不妨试一下这个小工具，说不定能给你带来意外的收获。
项目开源地址：https://github.com/hatoo/oha
