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main.rs
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main.rs
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mod storage_v1_types;
use anyhow::Context;
use async_google_apis_common as common;
use env_logger;
use std::path::Path;
/// Create a new HTTPS client.
fn https_client() -> common::TlsClient {
let conn = hyper_rustls::HttpsConnectorBuilder::new().with_native_roots().https_or_http().enable_http2().build();
let cl = hyper::Client::builder().build(conn);
cl
}
async fn upload_file(
cl: &storage_v1_types::ObjectsService,
bucket: &str,
p: &Path,
prefix: &str,
) -> common::Result<()> {
let mut params = storage_v1_types::ObjectsInsertParams::default();
params.bucket = bucket.into();
assert!(prefix.ends_with("/") || prefix.is_empty());
params.name = Some(prefix.to_string() + p.file_name().unwrap().to_str().unwrap());
let obj = storage_v1_types::Object::default();
let f = tokio::fs::OpenOptions::new().read(true).open(p).await?;
let result = cl
.insert_resumable_upload(¶ms, &obj)
.await?
.set_max_chunksize(1024 * 1024 * 5)?
.upload_file(f)
.await?;
println!("Uploaded object: {:?}", result);
Ok(())
}
async fn download_file(
cl: &storage_v1_types::ObjectsService,
bucket: &str,
id: &str,
) -> common::Result<()> {
// Set alt=media for download.
let mut gparams = storage_v1_types::StorageParams::default();
gparams.alt = Some(storage_v1_types::StorageParamsAlt::Media);
let mut params = storage_v1_types::ObjectsGetParams::default();
params.storage_params = Some(gparams);
params.bucket = bucket.into();
params.object = id.into();
let id = id.replace("/", "_");
let mut f = tokio::fs::OpenOptions::new()
.write(true)
.create(true)
.open(id)
.await?;
let mut download = cl.get(¶ms).await?;
// Now run the actual download.
let result = download.do_it(Some(&mut f)).await?;
match result {
common::DownloadResult::Downloaded => println!("Downloaded object successfully."),
common::DownloadResult::Response(_) => panic!("Received response but expected download."),
}
Ok(())
}
fn print_objects(objs: &storage_v1_types::Objects) {
if let Some(ref objs) = objs.items {
for obj in objs.iter() {
println!(
"{} ({} B), class {}. Created @ {} by {}. => {}",
obj.name.as_ref().unwrap_or(&"(unknown name)".into()),
obj.size.as_ref().unwrap_or(&"(unknown size)".into()),
obj.storage_class
.as_ref()
.unwrap_or(&"(unknown class)".into()),
obj.time_created
.as_ref()
.map(|dt| format!("{}", dt))
.unwrap_or("(unknown time)".into()),
obj.owner
.as_ref()
.unwrap_or(&Default::default())
.entity
.as_ref()
.unwrap_or(&"".into()),
obj.media_link.as_ref().unwrap_or(&"(unknown link)".into())
);
}
}
}
async fn list_objects(
cl: &storage_v1_types::ObjectsService,
bucket: &str,
prefix: &str,
) -> common::Result<()> {
let mut params = storage_v1_types::ObjectsListParams::default();
params.bucket = bucket.into();
params.prefix = Some(prefix.into());
params.storage_params = Some(storage_v1_types::StorageParams::default());
params.storage_params.as_mut().unwrap().fields = Some("*".into());
let mut npt = None;
loop {
params.page_token = npt.take();
let result = cl.list(¶ms).await?;
print_objects(&result);
if result.next_page_token.is_some() {
npt = result.next_page_token.clone();
} else {
break;
}
}
Ok(())
}
async fn rm_object(
cl: &storage_v1_types::ObjectsService,
bucket: &str,
id: &str,
) -> common::Result<()> {
let mut params = storage_v1_types::ObjectsDeleteParams::default();
params.bucket = bucket.into();
params.object = id.into();
cl.delete(¶ms).await
}
#[tokio::main]
async fn main() {
env_logger::init();
let matches = clap::App::new("gcs_example")
.version("0.1")
.about("Upload objects to GCS.")
.arg(
clap::Arg::with_name("BUCKET")
.help("target bucket")
.long("bucket")
.required(true)
.short("b")
.takes_value(true),
)
.arg(
clap::Arg::with_name("ACTION")
.help("What to do.")
.long("action")
.possible_values(&["get", "list", "put", "rm"])
.required(true)
.short("a")
.takes_value(true),
)
.arg(
clap::Arg::with_name("PREFIX")
.help("When listing with -a list: Prefix of objects to list. When uploading with -a put: Prefix to prepend to filename.")
.long("prefix")
.short("p")
.takes_value(true),
)
.arg(
clap::Arg::with_name("FILE_OR_OBJECT")
.help("File to upload")
.index(1),
)
.get_matches();
let https_client = https_client();
let service_account_key = common::yup_oauth2::read_service_account_key("client_secret.json")
.await
.map_err(anyhow::Error::from)
.context("client_secret.json")
.unwrap();
let authenticator =
common::yup_oauth2::ServiceAccountAuthenticator::builder(service_account_key)
.hyper_client(https_client.clone())
.persist_tokens_to_disk("tokencache.json")
.build()
.await
.expect("ServiceAccount authenticator failed.");
let authenticator = std::sync::Arc::new(authenticator);
let action = matches.value_of("ACTION").expect("--action is required.");
let buck = matches
.value_of("BUCKET")
.expect("--bucket is a mandatory argument.");
let cl = storage_v1_types::ObjectsService::new(https_client, authenticator);
if action == "get" {
let obj = matches
.value_of("FILE_OR_OBJECT")
.expect("OBJECT is a mandatory argument.");
download_file(&cl, buck, obj)
.await
.expect("Download failed :(");
} else if action == "put" {
let fp = matches
.value_of("FILE_OR_OBJECT")
.expect("FILE is a mandatory argument.");
let mut pre = matches.value_of("PREFIX").unwrap_or("").to_string();
if !pre.ends_with("/") && !pre.is_empty() {
pre = pre.to_string() + "/";
}
upload_file(&cl, buck, Path::new(&fp), &pre)
.await
.expect("Upload failed :(");
return;
} else if action == "list" {
let prefix = matches.value_of("PREFIX").unwrap_or("");
list_objects(&cl, buck, prefix)
.await
.expect("List failed :(");
return;
} else if action == "rm" {
let obj = matches
.value_of("FILE_OR_OBJECT")
.expect("OBJECT is a mandatory argument.");
rm_object(&cl, buck, obj).await.expect("rm failed :(");
return;
}
}