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Облачное хранение и веб-интерфейсы

Симуляция сервера системы файлов Wolfram Engine

Веб-разработка для облачного хранения файлов Wolfram Cloud может быть в значительной степени осуществлена без непосредственной загрузки чего-либо в файловую систему. Действия таких функций, как Delayed, FormFunction, и APIFunction можно проиллюстрировать с помощью функции GenerateHTTPResponse. Пользователь может изучить все аспекты работы HTTPResponse, в том числе код состояния, тип содержания и заголовки. Веб-приложения могут быть написаны, изменены, и испытаны автоматически с помощью этих возможностей. Работа функций может быть рассмотрена и в локальном веб-браузере, для чего необходимо нажать на диск статуса задачи в окне HTTPResponse.

Проиллюстрируем запрос к отсроченному объекту файловой системы, который составляет таблицу с информацией о семи горах, находящихся ближе всего к месту расположения пользователя.

In[1]:=
Click for copyable input
response = GenerateHTTPResponse[ Delayed[Map[ Composition[ Replace[#, {n_, el_, r_, pos_} :> {n, ToString[Round[el]], StringJoin[ Riffle[Switch[r, {_String ..}, r, _List, CommonName[r], _, r], ", "]], ToString[GeoDistance[$GeoLocation, pos]], ToString@Latitude[pos], ToString@Longitude[pos]}] &, MountainData[#, {"Name", "Elevation", "MountainRange", "Position"}] &], GeoNearest["Mountain", $GeoLocation, 7]], "CSV"] ]
Out[1]=

Нажмите на зеленый круг состояния, чтобы открыть локальную копию созданной таблицы.

In[2]:=
Click for copyable input
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Проиллюстрируем запрос к функции APIFunction.

In[3]:=
Click for copyable input
response = GenerateHTTPResponse[ APIFunction["ticker" -> "TickerSymbol", EntityValue[#ticker, EntityProperty["Financial", "Last"]] &], <| "Query" -> {"ticker" -> "FDX"}|>]
In[4]:=
Click for copyable input
\[AliasDelimiter]
Out[4]=

Рассмотрим каждый компонент ответа.

In[5]:=
Click for copyable input
response[{"StatusCode", "ContentType", "Body"}]
Out[5]=

Протестируем функцию в ситуации неверно выполненного запроса.

In[6]:=
Click for copyable input
response = GenerateHTTPResponse[ APIFunction["ticker" -> "TickerSymbol", EntityValue[#ticker, EntityProperty["Financial", "Last"]] &, {"WL", None, "WL"}], <| "Query" -> {"ticker" -> "134"}|>]
Out[6]=

Рассмотрим отчёт об ошибке.

In[7]:=
Click for copyable input
response["Body"]
Out[7]=

Родственные примеры

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