cargo/util/network/
http.rs

1//! Configures libcurl's http handles.
2
3use std::path::PathBuf;
4use std::str;
5use std::time::Duration;
6
7use anyhow::bail;
8use curl::easy::Easy;
9use curl::easy::Easy2;
10use curl::easy::InfoType;
11use curl::easy::SslOpt;
12use curl::easy::SslVersion;
13use tracing::debug;
14use tracing::trace;
15
16use crate::CargoResult;
17use crate::GlobalContext;
18use crate::util::context::SslVersionConfig;
19use crate::util::context::SslVersionConfigRange;
20
21/// Creates a new HTTP handle with appropriate global configuration for cargo.
22pub fn http_handle(gctx: &GlobalContext) -> CargoResult<Easy> {
23    let (mut handle, timeout) = http_handle_and_timeout(gctx)?;
24    timeout.configure(&mut handle)?;
25    Ok(handle)
26}
27
28pub fn http_handle_and_timeout(gctx: &GlobalContext) -> CargoResult<(Easy, HttpTimeout)> {
29    // The timeout option for libcurl by default times out the entire transfer,
30    // but we probably don't want this. Instead we only set timeouts for the
31    // connect phase as well as a "low speed" timeout so if we don't receive
32    // many bytes in a large-ish period of time then we time out.
33    let mut handle = Easy::new();
34    let timeout = configure_http_handle(gctx, &mut handle)?;
35    Ok((handle, timeout))
36}
37
38// Only use a custom transport if any HTTP options are specified,
39// such as proxies or custom certificate authorities.
40//
41// The custom transport, however, is not as well battle-tested.
42pub fn needs_custom_http_transport(gctx: &GlobalContext) -> CargoResult<bool> {
43    Ok(super::proxy::http_proxy_exists(gctx.http_config()?, gctx)
44        || *gctx.http_config()? != Default::default()
45        || gctx.get_env_os("HTTP_TIMEOUT").is_some())
46}
47/// Configure a libcurl http handle with the defaults options for Cargo
48pub struct HandleConfiguration {
49    proxy: Option<String>,
50    cainfo: Option<PathBuf>,
51    proxy_cainfo: Option<String>,
52    ssl_options: Option<SslOpt>,
53    useragent: String,
54    ssl_version: Option<SslVersion>,
55    ssl_min_max_version: Option<(SslVersion, SslVersion)>,
56    timeout: HttpTimeout,
57    pub verbose: bool,
58    pub multiplexing: bool,
59}
60
61pub fn configure_http_handle(gctx: &GlobalContext, handle: &mut Easy) -> CargoResult<HttpTimeout> {
62    let configuration = HandleConfiguration::new(gctx)?;
63    configuration.configure(handle)?;
64    Ok(configuration.timeout)
65}
66
67impl HandleConfiguration {
68    pub fn new(gctx: &GlobalContext) -> CargoResult<Self> {
69        if let Some(offline_flag) = gctx.offline_flag() {
70            bail!(
71                "attempting to make an HTTP request, but {offline_flag} was \
72                specified"
73            )
74        }
75
76        let http = gctx.http_config()?;
77        let timeout = HttpTimeout::new(gctx)?;
78        let useragent = if let Some(user_agent) = http.user_agent.clone() {
79            user_agent
80        } else {
81            format!("cargo/{}", crate::version())
82        };
83        let multiplexing = http.multiplexing.unwrap_or(true);
84        let mut handle = HandleConfiguration {
85            proxy: None,
86            cainfo: None,
87            proxy_cainfo: None,
88            ssl_options: None,
89            useragent,
90            ssl_version: None,
91            ssl_min_max_version: None,
92            verbose: false,
93            timeout,
94            multiplexing,
95        };
96        if let Some(proxy) = super::proxy::http_proxy(http) {
97            handle.proxy = Some(proxy);
98        }
99        if let Some(cainfo) = &http.cainfo {
100            let cainfo = cainfo.resolve_path(gctx);
101            handle.cainfo = Some(cainfo);
102        }
103        // Use `proxy_cainfo` if explicitly set; otherwise, fall back to `cainfo` as curl does #15376.
104        if let Some(proxy_cainfo) = http.proxy_cainfo.as_ref().or(http.cainfo.as_ref()) {
105            let proxy_cainfo = proxy_cainfo.resolve_path(gctx);
106            handle.proxy_cainfo = Some(format!("{}", proxy_cainfo.display()));
107        }
108        if let Some(check) = http.check_revoke {
109            let mut v = SslOpt::new();
110            v.no_revoke(!check);
111            handle.ssl_options = Some(v);
112        }
113
114        fn to_ssl_version(s: &str) -> CargoResult<SslVersion> {
115            let version = match s {
116                "default" => SslVersion::Default,
117                "tlsv1" => SslVersion::Tlsv1,
118                "tlsv1.0" => SslVersion::Tlsv10,
119                "tlsv1.1" => SslVersion::Tlsv11,
120                "tlsv1.2" => SslVersion::Tlsv12,
121                "tlsv1.3" => SslVersion::Tlsv13,
122                _ => bail!(
123                    "Invalid ssl version `{s}`,\
124                    choose from 'default', 'tlsv1', 'tlsv1.0', 'tlsv1.1', 'tlsv1.2', 'tlsv1.3'."
125                ),
126            };
127            Ok(version)
128        }
129
130        if let Some(ssl_version) = &http.ssl_version {
131            match ssl_version {
132                SslVersionConfig::Single(s) => {
133                    let version = to_ssl_version(s.as_str())?;
134                    handle.ssl_version = Some(version);
135                }
136                SslVersionConfig::Range(SslVersionConfigRange { min, max }) => {
137                    let min_version = min
138                        .as_ref()
139                        .map_or(Ok(SslVersion::Default), |s| to_ssl_version(s))?;
140                    let max_version = max
141                        .as_ref()
142                        .map_or(Ok(SslVersion::Default), |s| to_ssl_version(s))?;
143                    handle.ssl_min_max_version = Some((min_version, max_version));
144                }
145            }
146        } else if cfg!(windows) {
147            // This is a temporary workaround for some bugs with libcurl and
148            // schannel and TLS 1.3.
149            //
150            // Our libcurl on Windows is usually built with schannel.
151            // On Windows 11 (or Windows Server 2022), libcurl recently (late
152            // 2022) gained support for TLS 1.3 with schannel, and it now defaults
153            // to 1.3. Unfortunately there have been some bugs with this.
154            // https://github.com/curl/curl/issues/9431 is the most recent. Once
155            // that has been fixed, and some time has passed where we can be more
156            // confident that the 1.3 support won't cause issues, this can be
157            // removed.
158            //
159            // Windows 10 is unaffected. libcurl does not support TLS 1.3 on
160            // Windows 10. (Windows 10 sorta had support, but it required enabling
161            // an advanced option in the registry which was buggy, and libcurl
162            // does runtime checks to prevent it.)
163            handle.ssl_min_max_version = Some((SslVersion::Default, SslVersion::Tlsv12));
164        }
165
166        if let Some(true) = http.debug {
167            handle.verbose = true;
168        }
169
170        Ok(handle)
171    }
172
173    pub fn configure(&self, handle: &mut Easy) -> Result<(), curl::Error> {
174        if let Some(v) = &self.proxy {
175            handle.proxy(&v)?;
176        }
177        if let Some(v) = &self.cainfo {
178            handle.cainfo(&v)?;
179        }
180        if let Some(v) = &self.proxy_cainfo {
181            handle.proxy_cainfo(&v)?;
182        }
183        if let Some(v) = &self.ssl_options {
184            handle.ssl_options(&v)?;
185        }
186        handle.useragent(&self.useragent)?;
187        // Empty string accept encoding expands to the encodings supported by the current libcurl.
188        handle.accept_encoding("")?;
189        if let Some(v) = &self.ssl_version {
190            handle.ssl_version(v.clone())?;
191        }
192        if let Some((min, max)) = &self.ssl_min_max_version {
193            handle.ssl_min_max_version(min.clone(), max.clone())?;
194        }
195        if self.verbose {
196            handle.verbose(true)?;
197            tracing::debug!(target: "network", "{:#?}", curl::Version::get());
198            handle.debug_function(debug)?;
199        }
200        Ok(())
201    }
202
203    pub fn configure2<T>(&self, handle: &mut Easy2<T>) -> Result<(), curl::Error> {
204        if let Some(v) = &self.proxy {
205            handle.proxy(&v)?;
206        }
207        if let Some(v) = &self.cainfo {
208            handle.cainfo(&v)?;
209        }
210        if let Some(v) = &self.proxy_cainfo {
211            handle.proxy_cainfo(&v)?;
212        }
213        if let Some(v) = &self.ssl_options {
214            handle.ssl_options(&v)?;
215        }
216        handle.useragent(&self.useragent)?;
217        // Empty string accept encoding expands to the encodings supported by the current libcurl.
218        handle.accept_encoding("")?;
219        if let Some(v) = &self.ssl_version {
220            handle.ssl_version(v.clone())?;
221        }
222        if let Some((min, max)) = &self.ssl_min_max_version {
223            handle.ssl_min_max_version(min.clone(), max.clone())?;
224        }
225        if self.verbose {
226            handle.verbose(true)?;
227            tracing::debug!(target: "network", "{:#?}", curl::Version::get());
228        }
229        self.timeout.configure2(handle)?;
230
231        // Enable HTTP/2 if possible.
232        crate::try_old_curl_http2_pipewait!(self.multiplexing, handle);
233        Ok(())
234    }
235}
236
237pub(crate) fn debug(kind: InfoType, data: &[u8]) {
238    enum LogLevel {
239        Debug,
240        Trace,
241    }
242    use LogLevel::*;
243    let (prefix, level) = match kind {
244        InfoType::Text => ("*", Debug),
245        InfoType::HeaderIn => ("<", Debug),
246        InfoType::HeaderOut => (">", Debug),
247        InfoType::DataIn => ("{", Trace),
248        InfoType::DataOut => ("}", Trace),
249        InfoType::SslDataIn | InfoType::SslDataOut => return,
250        _ => return,
251    };
252    let starts_with_ignore_case = |line: &str, text: &str| -> bool {
253        let line = line.as_bytes();
254        let text = text.as_bytes();
255        line[..line.len().min(text.len())].eq_ignore_ascii_case(text)
256    };
257    match str::from_utf8(data) {
258        Ok(s) => {
259            for mut line in s.lines() {
260                if starts_with_ignore_case(line, "authorization:") {
261                    line = "Authorization: [REDACTED]";
262                } else if starts_with_ignore_case(line, "h2h3 [authorization:") {
263                    line = "h2h3 [Authorization: [REDACTED]]";
264                } else if starts_with_ignore_case(line, "set-cookie") {
265                    line = "set-cookie: [REDACTED]";
266                }
267                match level {
268                    Debug => debug!(target: "network", "http-debug: {prefix} {line}"),
269                    Trace => trace!(target: "network", "http-debug: {prefix} {line}"),
270                }
271            }
272        }
273        Err(_) => {
274            let len = data.len();
275            match level {
276                Debug => {
277                    debug!(target: "network", "http-debug: {prefix} ({len} bytes of data)")
278                }
279                Trace => {
280                    trace!(target: "network", "http-debug: {prefix} ({len} bytes of data)")
281                }
282            }
283        }
284    }
285}
286
287#[must_use]
288pub struct HttpTimeout {
289    pub dur: Duration,
290    pub low_speed_limit: u32,
291}
292
293impl HttpTimeout {
294    pub fn new(gctx: &GlobalContext) -> CargoResult<HttpTimeout> {
295        let http_config = gctx.http_config()?;
296        let low_speed_limit = http_config.low_speed_limit.unwrap_or(10);
297        let seconds = http_config
298            .timeout
299            .or_else(|| {
300                gctx.get_env("HTTP_TIMEOUT")
301                    .ok()
302                    .and_then(|s| s.parse().ok())
303            })
304            .unwrap_or(30);
305        Ok(HttpTimeout {
306            dur: Duration::new(seconds, 0),
307            low_speed_limit,
308        })
309    }
310
311    pub fn configure(&self, handle: &mut Easy) -> CargoResult<()> {
312        // The timeout option for libcurl by default times out the entire
313        // transfer, but we probably don't want this. Instead we only set
314        // timeouts for the connect phase as well as a "low speed" timeout so
315        // if we don't receive many bytes in a large-ish period of time then we
316        // time out.
317        handle.connect_timeout(self.dur)?;
318        handle.low_speed_time(self.dur)?;
319        handle.low_speed_limit(self.low_speed_limit)?;
320        Ok(())
321    }
322
323    pub fn configure2<T>(&self, handle: &mut Easy2<T>) -> Result<(), curl::Error> {
324        // The timeout option for libcurl by default times out the entire
325        // transfer, but we probably don't want this. Instead we only set
326        // timeouts for the connect phase as well as a "low speed" timeout so
327        // if we don't receive many bytes in a large-ish period of time then we
328        // time out.
329        handle.connect_timeout(self.dur)?;
330        handle.low_speed_time(self.dur)?;
331        handle.low_speed_limit(self.low_speed_limit)?;
332        Ok(())
333    }
334}
cargo/util/network/http.rs

cargo/util/network/
http.rs
