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Import data from Google Cloud Storage, save locally, produce png, and save to Google Cloud Storage.
Pkg.add("Gadfly")
Pkg.add("HTTPClient")
Pkg.add("JSON")
Pkg.add("RDatasets")
using Gadfly
using HTTPClient.HTTPC
using JSON
using RDatasets
token_url = "http://metadata/computeMetadata/v1/instance/service-accounts/default/token"
request = HTTPC.get(token_url, RequestOptions(headers=[("X-Google-Metadata-Request", "True")]))
access_token = JSON.parse(bytestring(request.body))["access_token"]
bucket_name = <bucket_name>
file_name = <data_file_name>
project_number = <project_number>
request_url = string("https://www.googleapis.com/storage/v1beta2/b/", bucket_name, "/o/", file_name, "?alt=media")
request = HTTPC.get(request_url, RequestOptions(headers=[("Authorization", string("OAuth ", access_token)),
("x-goog-api-version", "2"),
("x-goog-project-id", project_number)]))
fp = open(file_name, "w")
write(fp, takebuf_string(request.body))
wine_data = readtable(file_name)
alcohol_vs_magnesium = plot(wine_data, x="Alcohol", y="Magnesium", Geom.point)
png_name = "alcohol_vs_magnesium.png"
draw(PNG(png_name, 6inch, 3inch),alcohol_vs_magnesium)
file_len = strip(readall(`stat -c %s $png_name`))
request_url = string("https://www.googleapis.com/upload/storage/v1beta2/b/", bucket_name, "/o?uploadType=media&name=",png_name)
options = RequestOptions(headers=[("Authorization", string("OAuth ", access_token)),("Content-Type","image/png"),("Content-Length", string(file_len))])
request = HTTPC.post(request_url, (:file, png_name), options)
println(request.http_code)
println("Check your bucket!")
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