Sync Request API

Overview
This document provides an overview of APIs and SDK code samples for sync requests for file preview.
API
Description
Sync request API
Synchronously requests for file preview.
Sync Request API
Feature description
This API is used to synchronously request for file preview.
Method prototype
    def ci_doc_preview_process(self, Bucket, Key, SrcType=None, Page=None, DstType=None, PassWord=None, Comment=0, Sheet=1,
                               ExcelPaperDirection=0, ExcelRow=0, ExcelCol=0, ExcelPaperSize=None, TxtPagination=False,
                               ImageParams=None, Quality=100, Scale=100, ImageDpi=96, **kwargs)
Sample request
    def ci_doc_preview_process():
        # Sync file preview API
        response = client.ci_doc_preview_process(
            Bucket=bucket_name,
            Key='1.txt',
        )
        print(response)
        response['Body'].get_stream_to_file('result.png')
Parameter description
Parameter
Description
Type
Bucket
Bucket of the object
String
Key
Object name, such as folder/document.pdf.
String
SrcType
Source data type. Currently, the file conversion feature determines the source data type according to the file extension of the COS object. If the object has no extension, you can set this value.
String
Page
Number of the page to be converted, which is counted from 1 by default. For spreadsheets, page indicates to convert the xth image in the xth sheet.
int
DstType
Type of the output target image file. Valid values: png, jpg, pdf. If the input file format cannot be recognized, the jpg format will be used by default.
String
Password
Password to open the Office file. If you need to convert a password-protected file, set this field.
String
Comment
Whether to hide comments and apply track changes. 0: hide comments and apply track changes; 1: show comments and track changes. Default value: 0.
int
Sheet
Sheet parameter, indicating to convert the xth sheet. Default value: 1.
int
ExcelPaperDirection
Paper orientation of the spreadsheet. 0: vertical; other values: horizontal. Default value: 0.
int
ExcelRow
The value 1 indicates that all rows will be formatted on one page. Default value: 0.
int
ExcelCol
The value 1 indicates that all columns will be formatted on one page. Default value: 0.
int
ExcelPaperSize
Page (canvas) size. Valid values: 0 (A4), 1 (A2), 2 (A0). Default value: 0. This parameter needs to be used together with excelRow or excelCol.
int
TxtPagination
Whether to convert to long text. When this parameter is set to true, the text in the pages to be exported can be combined before export, and the pagination range can be controlled by Ranges. The default value is false, indicating to generate .txt files by page. This parameter takes effect only if ExportType is txt.
bool
ImageParams
Processing parameters for the output image. All parameters of basic image processing are supported. To specify multiple parameters, separate them with pipeline operators. In this way, the image can be processed by multiple parameters in sequence in the same request.
String
Quality
Quality of the generated preview image. Value range: [1-100]. Default value: 100. For example, if the value is 100, the quality of the generated image will be 100%.
int
Scale
Scaling parameter of the preview image. Value range: [10, 200]. Default value: 100. For example, if the value is 200, the image will be scaled up (enlarged) by 200%.
int
ImageDpi
Renders the image according to the specified DPI. This parameter works together with scale. Value range: 96–600. Default value: 96. The width of the output image must be less than 65500 px.
int

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API	Description
Sync request API	Synchronously requests for file preview.

Parameter	Description	Type
Bucket	Bucket of the object	String
Key	Object name, such as `folder/document.pdf`.	String
SrcType	Source data type. Currently, the file conversion feature determines the source data type according to the file extension of the COS object. If the object has no extension, you can set this value.	String
Page	Number of the page to be converted, which is counted from 1 by default. For spreadsheets, `page` indicates to convert the xth image in the xth sheet.	int
DstType	Type of the output target image file. Valid values: `png`, `jpg`, `pdf`. If the input file format cannot be recognized, the `jpg` format will be used by default.	String
Password	Password to open the Office file. If you need to convert a password-protected file, set this field.	String
Comment	Whether to hide comments and apply track changes. 0: hide comments and apply track changes; 1: show comments and track changes. Default value: `0`.	int
Sheet	Sheet parameter, indicating to convert the xth sheet. Default value: `1`.	int
ExcelPaperDirection	Paper orientation of the spreadsheet. `0`: vertical; other values: horizontal. Default value: `0`.	int
ExcelRow	The value `1` indicates that all rows will be formatted on one page. Default value: `0`.	int
ExcelCol	The value `1` indicates that all columns will be formatted on one page. Default value: `0`.	int
ExcelPaperSize	Page (canvas) size. Valid values: `0` (A4), `1` (A2), `2` (A0). Default value: `0`. This parameter needs to be used together with `excelRow` or `excelCol`.	int
TxtPagination	Whether to convert to long text. When this parameter is set to `true`, the text in the pages to be exported can be combined before export, and the pagination range can be controlled by `Ranges`. The default value is `false`, indicating to generate .txt files by page. This parameter takes effect only if `ExportType` is `txt`.	bool
ImageParams	Processing parameters for the output image. All parameters of basic image processing are supported. To specify multiple parameters, separate them with pipeline operators. In this way, the image can be processed by multiple parameters in sequence in the same request.	String
Quality	Quality of the generated preview image. Value range: [1-100]. Default value: `100`. For example, if the value is `100`, the quality of the generated image will be 100%.	int
Scale	Scaling parameter of the preview image. Value range: [10, 200]. Default value: `100`. For example, if the value is `200`, the image will be scaled up (enlarged) by 200%.	int
ImageDpi	Renders the image according to the specified DPI. This parameter works together with `scale`. Value range: 96–600. Default value: `96`. The width of the output image must be less than 65500 px.	int

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