Implemented reqwest integration

Signed-off-by: Francesco Guardiani <francescoguard@gmail.com>
This commit is contained in:
slinkydeveloper 2020-05-18 14:36:58 +02:00 committed by Francesco Guardiani
parent 4814505b92
commit 8c45200807
8 changed files with 1022 additions and 2 deletions

539
Cargo.lock generated
View File

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version = "0.2.62"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a91c2916119c17a8e316507afaaa2dd94b47646048014bbdf6bef098c1bb58ad"
[[package]]
name = "web-sys"
version = "0.3.39"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8bc359e5dd3b46cb9687a051d50a2fdd228e4ba7cf6fcf861a5365c3d671a642"
dependencies = [
"js-sys",
"wasm-bindgen",
]
[[package]]
name = "widestring"
version = "0.4.0"

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@ -33,5 +33,6 @@ name = "cloudevents"
[workspace]
members = [
".",
"cloudevents-sdk-actix-web"
"cloudevents-sdk-actix-web",
"cloudevents-sdk-reqwest"
]

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@ -20,6 +20,7 @@ Work in progress SDK for [CloudEvents](https://github.com/cloudevents/spec)
* `cloudevents-sdk`: Provides Event data structure, JSON Event format implementation
* `cloudevents-sdk-actix-web`: Integration with [Actix Web](https://github.com/actix/actix-web)
* `cloudevents-sdk-reqwest`: Integration with [reqwest](https://github.com/seanmonstar/reqwest)
## Development & Contributing

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@ -0,0 +1,19 @@
[package]
name = "cloudevents-sdk-reqwest"
version = "0.1.0"
authors = ["Francesco Guardiani <francescoguard@gmail.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
cloudevents-sdk = { path = ".." }
reqwest = { version = "0.10" }
lazy_static = "1.4.0"
bytes = "^0.5"
serde_json = "^1.0"
url = { version = "^2.1", features = ["serde"] }
[dev-dependencies]
mockito = "0.25.1"
tokio = { version = "^0.2", features = ["full"] }

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@ -0,0 +1,175 @@
use super::headers;
use cloudevents::event::SpecVersion;
use cloudevents::message::{
BinaryDeserializer, BinarySerializer, MessageAttributeValue,
Result, StructuredSerializer,
};
use cloudevents::Event;
use reqwest::RequestBuilder;
use std::str::FromStr;
/// Wrapper for [`RequestBuilder`] that implements [`StructuredSerializer`] & [`BinarySerializer`] traits
pub struct RequestSerializer {
req: RequestBuilder,
}
impl RequestSerializer {
pub fn new(req: RequestBuilder) -> RequestSerializer {
RequestSerializer { req }
}
}
impl BinarySerializer<RequestBuilder> for RequestSerializer {
fn set_spec_version(mut self, spec_version: SpecVersion) -> Result<Self> {
self.req = self
.req
.header(headers::SPEC_VERSION_HEADER.clone(), spec_version.as_str());
Ok(self)
}
fn set_attribute(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
self.req = self.req.header(
headers::ATTRIBUTES_TO_HEADERS.get(name).unwrap().clone(),
value.to_string(),
);
Ok(self)
}
fn set_extension(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
self.req = self
.req
.header(attribute_name_to_header!(name)?, value.to_string());
Ok(self)
}
fn end_with_data(self, bytes: Vec<u8>) -> Result<RequestBuilder> {
Ok(self.req.body(bytes))
}
fn end(self) -> Result<RequestBuilder> {
Ok(self.req)
}
}
impl StructuredSerializer<RequestBuilder> for RequestSerializer {
fn set_structured_event(self, bytes: Vec<u8>) -> Result<RequestBuilder> {
Ok(self
.req
.header(
reqwest::header::CONTENT_TYPE,
headers::CLOUDEVENTS_JSON_HEADER.clone(),
)
.body(bytes))
}
}
/// Method to transform an incoming [`HttpRequest`] to [`Event`]
pub fn event_to_request(
event: Event,
request_builder: RequestBuilder,
) -> Result<RequestBuilder> {
BinaryDeserializer::deserialize_binary(event, RequestSerializer::new(request_builder))
}
#[cfg(test)]
mod tests {
use super::*;
use mockito::{mock, Matcher};
use cloudevents::EventBuilder;
use serde_json::json;
use url::Url;
use cloudevents::message::StructuredDeserializer;
#[tokio::test]
async fn test_request() {
let url = mockito::server_url();
let m = mock("POST", "/")
.match_header("ce-specversion", "1.0")
.match_header("ce-id", "0001")
.match_header("ce-type", "example.test")
.match_header("ce-source", "http://localhost/")
.match_header("ce-someint", "10")
.match_body(Matcher::Missing)
.create();
let input = EventBuilder::new()
.id("0001")
.ty("example.test")
.source(Url::from_str("http://localhost/").unwrap())
.extension("someint", "10")
.build();
let client = reqwest::Client::new();
event_to_request(input, client.post(&url))
.unwrap()
.send()
.await
.unwrap();
m.assert();
}
#[tokio::test]
async fn test_request_with_full_data() {
let j = json!({"hello": "world"});
let url = mockito::server_url();
let m = mock("POST", "/")
.match_header("ce-specversion", "1.0")
.match_header("ce-id", "0001")
.match_header("ce-type", "example.test")
.match_header("ce-source", "http://localhost/")
.match_header("content-type", "application/json")
.match_header("ce-someint", "10")
.match_body(Matcher::Exact(j.to_string()))
.create();
let input = EventBuilder::new()
.id("0001")
.ty("example.test")
.source(Url::from_str("http://localhost").unwrap())
.data("application/json", j.clone())
.extension("someint", "10")
.build();
let client = reqwest::Client::new();
event_to_request(input, client.post(&url))
.unwrap()
.send()
.await
.unwrap();
m.assert();
}
#[tokio::test]
async fn test_structured_request_with_full_data() {
let j = json!({"hello": "world"});
let input = EventBuilder::new()
.id("0001")
.ty("example.test")
.source(Url::from_str("http://localhost").unwrap())
.data("application/json", j.clone())
.extension("someint", "10")
.build();
let url = mockito::server_url();
let m = mock("POST", "/")
.match_header("content-type", "application/cloudevents+json")
.match_body(Matcher::Exact(serde_json::to_string(&input).unwrap()))
.create();
let client = reqwest::Client::new();
StructuredDeserializer::deserialize_structured(
input,
RequestSerializer::new(client.post(&url))
).unwrap()
.send()
.await
.unwrap();
m.assert();
}
}

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@ -0,0 +1,215 @@
use super::headers;
use reqwest::Response;
use cloudevents::event::SpecVersion;
use cloudevents::message::{BinaryDeserializer, BinarySerializer, Encoding, MessageAttributeValue, MessageDeserializer, StructuredDeserializer, StructuredSerializer, Result, Error};
use cloudevents::{message, Event};
use std::convert::TryFrom;
use bytes::Bytes;
use reqwest::header::{HeaderMap, HeaderName};
/// Wrapper for [`Response`] that implements [`MessageDeserializer`] trait
pub struct ResponseDeserializer {
headers: HeaderMap,
body: Bytes,
}
impl ResponseDeserializer {
pub fn new(headers: HeaderMap, body: Bytes) -> ResponseDeserializer {
ResponseDeserializer { headers, body }
}
}
impl BinaryDeserializer for ResponseDeserializer {
fn deserialize_binary<R: Sized, V: BinarySerializer<R>>(
self,
mut visitor: V,
) -> Result<R> {
if self.encoding() != Encoding::BINARY {
return Err(message::Error::WrongEncoding {});
}
let spec_version = SpecVersion::try_from(
unwrap_optional_header!(self.headers, headers::SPEC_VERSION_HEADER).unwrap()?,
)?;
visitor = visitor.set_spec_version(spec_version.clone())?;
let attributes = cloudevents::event::spec_version::ATTRIBUTE_NAMES
.get(&spec_version)
.unwrap();
for (hn, hv) in
self.headers.iter().filter(|(hn, _)| {
headers::SPEC_VERSION_HEADER.ne(hn) && hn.as_str().starts_with("ce-")
})
{
let name = &hn.as_str()["ce-".len()..];
if attributes.contains(&name) {
visitor = visitor.set_attribute(
name,
MessageAttributeValue::String(String::from(header_value_to_str!(hv)?)),
)?
} else {
visitor = visitor.set_extension(
name,
MessageAttributeValue::String(String::from(header_value_to_str!(hv)?)),
)?
}
}
if let Some(hv) = self.headers.get("content-type") {
visitor = visitor.set_attribute(
"datacontenttype",
MessageAttributeValue::String(String::from(header_value_to_str!(hv)?)),
)?
}
if self.body.len() != 0 {
visitor.end_with_data(self.body.to_vec())
} else {
visitor.end()
}
}
}
impl StructuredDeserializer for ResponseDeserializer {
fn deserialize_structured<R: Sized, V: StructuredSerializer<R>>(
self,
visitor: V,
) -> Result<R> {
if self.encoding() != Encoding::STRUCTURED {
return Err(message::Error::WrongEncoding {});
}
visitor.set_structured_event(self.body.to_vec())
}
}
impl MessageDeserializer for ResponseDeserializer {
fn encoding(&self) -> Encoding {
match (
unwrap_optional_header!(self.headers, reqwest::header::CONTENT_TYPE)
.map(|r| r.ok())
.flatten()
.map(|e| e.starts_with("application/cloudevents+json")),
self.headers.get::<&'static HeaderName>(&headers::SPEC_VERSION_HEADER)
) {
(Some(true), _) => Encoding::STRUCTURED,
(_, Some(_)) => Encoding::BINARY,
_ => Encoding::UNKNOWN
}
}
}
/// Method to transform an incoming [`Response`] to [`Event`]
pub async fn response_to_event(
res: Response,
) -> Result<Event> {
let h = res.headers().to_owned();
let b = res.bytes().await.map_err(|e| Error::Other {source: Box::new(e)})?;
MessageDeserializer::into_event(ResponseDeserializer::new(h, b))
}
#[cfg(test)]
mod tests {
use super::*;
use mockito::mock;
use cloudevents::EventBuilder;
use serde_json::json;
use url::Url;
use std::str::FromStr;
#[tokio::test]
async fn test_response() {
let url = mockito::server_url();
let _m = mock("GET", "/")
.with_status(200)
.with_header("ce-specversion", "1.0")
.with_header("ce-id", "0001")
.with_header("ce-type", "example.test")
.with_header("ce-source", "http://localhost")
.with_header("ce-someint", "10")
.create();
let expected = EventBuilder::new()
.id("0001")
.ty("example.test")
.source(Url::from_str("http://localhost").unwrap())
.extension("someint", "10")
.build();
let client = reqwest::Client::new();
let res = client.get(&url)
.send()
.await
.unwrap();
let resp = response_to_event(res).await.unwrap();
assert_eq!(expected, resp);
}
#[tokio::test]
async fn test_response_with_full_data() {
let j = json!({"hello": "world"});
let url = mockito::server_url();
let _m = mock("GET", "/")
.with_status(200)
.with_header("ce-specversion", "1.0")
.with_header("ce-id", "0001")
.with_header("ce-type", "example.test")
.with_header("ce-source", "http://localhost/")
.with_header("content-type", "application/json")
.with_header("ce-someint", "10")
.with_body(j.to_string())
.create();
let expected = EventBuilder::new()
.id("0001")
.ty("example.test")
.source(Url::from_str("http://localhost").unwrap())
.data("application/json", j.clone())
.extension("someint", "10")
.build();
let client = reqwest::Client::new();
let res = client.get(&url)
.send()
.await
.unwrap();
let resp = response_to_event(res).await.unwrap();
assert_eq!(expected, resp);
}
#[tokio::test]
async fn test_structured_response_with_full_data() {
let j = json!({"hello": "world"});
let expected = EventBuilder::new()
.id("0001")
.ty("example.test")
.source(Url::from_str("http://localhost").unwrap())
.data("application/json", j.clone())
.extension("someint", "10")
.build();
let url = mockito::server_url();
let _m = mock("GET", "/")
.with_status(200)
.with_header("content-type", "application/cloudevents+json; charset=utf-8")
.with_body(serde_json::to_string(&expected).unwrap())
.create();
let client = reqwest::Client::new();
let res = client.get(&url)
.send()
.await
.unwrap();
let resp = response_to_event(res).await.unwrap();
assert_eq!(expected, resp);
}
}

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@ -0,0 +1,63 @@
use cloudevents::event::SpecVersion;
use lazy_static::lazy_static;
use reqwest::header::{HeaderName, HeaderValue};
use std::collections::HashMap;
use std::str::FromStr;
macro_rules! unwrap_optional_header {
($headers:expr, $name:expr) => {
$headers
.get::<&'static reqwest::header::HeaderName>(&$name)
.map(|a| header_value_to_str!(a))
};
}
macro_rules! header_value_to_str {
($header_value:expr) => {
$header_value
.to_str()
.map_err(|e| cloudevents::message::Error::Other {
source: Box::new(e),
})
};
}
macro_rules! str_name_to_header {
($attribute:expr) => {
reqwest::header::HeaderName::from_str($attribute).map_err(|e| {
cloudevents::message::Error::Other {
source: Box::new(e),
}
})
};
}
macro_rules! attribute_name_to_header {
($attribute:expr) => {
str_name_to_header!(&["ce-", $attribute].concat())
};
}
fn attributes_to_headers(
map: &HashMap<SpecVersion, &'static [&'static str]>,
) -> HashMap<&'static str, HeaderName> {
map.values()
.flat_map(|s| s.iter())
.map(|s| {
if *s == "datacontenttype" {
(*s, reqwest::header::CONTENT_TYPE)
} else {
(*s, attribute_name_to_header!(s).unwrap())
}
})
.collect()
}
lazy_static! {
pub(crate) static ref ATTRIBUTES_TO_HEADERS: HashMap<&'static str, HeaderName> =
attributes_to_headers(&cloudevents::event::spec_version::ATTRIBUTE_NAMES);
pub(crate) static ref SPEC_VERSION_HEADER: HeaderName =
HeaderName::from_static("ce-specversion");
pub(crate) static ref CLOUDEVENTS_JSON_HEADER: HeaderValue =
HeaderValue::from_static("application/cloudevents+json");
}

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@ -0,0 +1,9 @@
#[macro_use]
mod headers;
mod client_request;
mod client_response;
pub use client_request::event_to_request;
pub use client_request::RequestSerializer;
pub use client_response::response_to_event;
pub use client_response::ResponseDeserializer;