93 lines
3.2 KiB
Rust
93 lines
3.2 KiB
Rust
use std::collections::HashMap;
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use reqwest::{blocking::Response, header::HeaderMap};
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use url::Url;
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use crate::{GenerationError, Warning, WARNINGS};
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// A struct representing an HttpResponse and the Url it originated from.
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pub struct HttpResponse {
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url: Url,
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pub response: Response,
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}
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impl HttpResponse {
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/// Get the response headers.
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pub fn get_headers(&self) -> &HeaderMap {
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self.response.headers()
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}
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/// Attempt to convert the response to text. Exits the program if it fails.
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pub fn get_text(self) -> Result<String, GenerationError> {
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match self.response.text() {
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Ok(response_text) => Ok(response_text),
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Err(error) => Err(GenerationError::ResponseConvertToTextError { error }),
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}
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}
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/// Attempt to convert the response to bytes. Used for images. Exits the program if it fails.
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pub fn get_bytes(self) -> Result<bytes::Bytes, GenerationError> {
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match self.response.bytes() {
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Ok(response_bytes) => Ok(response_bytes),
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Err(error) => Err(GenerationError::ResponseConvertToBytesError { error }),
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}
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}
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/// Attempt to get the content(mime)-type and file extension from the http-header.
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///
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/// If the content-type header value can not be found it will warn the use and return empty strings.
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pub fn get_content_type_and_file_extension(&self) -> (String, String) {
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// A hashmap to convert mime-types to file extensions.
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let mime_to_file_extension: HashMap<&str, &str> = HashMap::from([
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("image/png", "png"),
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("image/webp", "webp"),
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("image/jpeg", "jpeg"),
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("image/jpg", "jpg"),
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]);
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let content_type = match self.get_headers()["content-type"].to_str() {
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Ok(content_type) => content_type,
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Err(warning) => {
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let warning = Warning::MissingContentType {
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warning_msg: "Unable to find or parse the content-type header".to_string(),
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url: self.url.clone(),
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error: warning,
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};
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WARNINGS.lock().unwrap().add_warning(warning);
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return (String::with_capacity(0), String::with_capacity(0));
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},
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};
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if mime_to_file_extension.contains_key(content_type) {
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return (
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content_type.to_string(),
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mime_to_file_extension[content_type].to_string(),
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);
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} else {
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return (content_type.to_string(), String::with_capacity(0));
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}
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}
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}
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/// Get an http response for a given url. Exits the program if it fails.
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pub fn get_response(url: Url) -> Result<HttpResponse, GenerationError> {
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let response_result = reqwest::blocking::get(url.clone());
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match response_result {
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Ok(response) => Ok(HttpResponse { url, response }),
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Err(error) => return Err(GenerationError::ResponseGetError { error, url }),
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}
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}
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/// A function to convert a string to a url. Exits the program if it fails.
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pub fn string_to_url(url: &str) -> Result<Url, GenerationError> {
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match Url::parse(url) {
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Ok(url) => Ok(url),
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Err(error) => Err(GenerationError::UrlParseError {
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error,
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string_url: url.to_string(),
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}),
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}
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}
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