in = null;
      }
    }
  }

  /** Closes the current input stream and opens the next one, if any. */
  private void advance() throws IOException {
    close();
    if (it.hasNext()) {
      in = it.next().openStream();
    }
  }

  @Override
  public int available() throws IOException {
    if (in == null) {
      return 0;
    }
    return in.available();
  }

  @Override

 * Copyright (C) 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

	st, err := client.gridConn.NewStream(ctx, grid.HandlerWalkDir, b)
	if err != nil {
		return toStorageErr(err)
	}
	return toStorageErr(st.Results(func(in []byte) error {
		_, err := wr.Write(in)
		return err
	}))
}

// WalkDirHandler - remote caller to list files and folders in a requested directory path.

# Security - First Steps

Let's imagine that you have your **backend** API in some domain.

And you have a **frontend** in another domain or in a different path of the same domain (or in a mobile application).

And you want to have a way for the frontend to authenticate with the backend, using a **username** and **password**.

We can use **OAuth2** to build that with **FastAPI**.

     * transform(ing) data in 512-bit message block(s), updating the variables
     * context and count, and leaving (buffering) the remaining bytes in buffer
     * for the next update or finish.
     *
     * @param    input    input block
     * @param    offset    start of meaningful bytes in input
     * @param    len        count of bytes in input block to consider
     */

ÜV}ˆ û( ò[ñ _UXe ÚóbˆGW@Ûòòu~¼Å}x)n}SIòºczlqûD²z|AÇqeZªBUgrV>a`@c¾ at‡ ˆ/wÄŽõÖÄÊ {ûrF² ²Gõh¾fÖ ïx²~Oò(in;þñ ªxTe„ áEtˆWEÑæåh}¼Àc¾ pBZv «£ „‡,ˆ Œ˜£ ƒš¼šš¾CxH†ê w>a`¼KeÆv¾ÀhGºNã¥Æ > fï(Ng1*Õº¾-[EªyKpˆMKs rrk† ~{#Å ~ˆ|W ûÈuq@ó²xÁmcizË®²CBjï{~¼[Và}yT_„<sZv¸ô‚¥ßÓïæBdG„wuXteòtK +x¼ &ïÀ3ef ˆ »6BeT”Ô^'oG¸{Mòúqh / 7lnGAN¤u}eVç†ã<a²=ŸÍõa_xCzÏøêa²ta[p(¦KEûb² G¾Âb}¼ eì ¾ êamTtªDé#>ü %3 >(5îu¨Î¥¥ò4 m}iª1 e ˆ:ß in;þ—]l15¦ ôiIòD²f}yF-°%vs]V“ß}kxéÁ9' û3ù ,WÉ Ì§_M›†ÞïÈ®eYFE¤çttkÈmq@ioìºcn²AË jw¤Âbm†H}Aþø77=+ 8þè¯èïúNm#*2Ö...

 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

    }

    static String queryLookup( String query, String param ) {
        char in[] = query.toCharArray();
        int i, ch, st, eq;

        st = eq = 0;
        for( i = 0; i < in.length; i++) {
            ch = in[i];
            if( ch == '&' ) {
                if( eq > st ) {
                    String p = new String( in, st, eq - st );
                    if( p.equalsIgnoreCase( param )) {

 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,